Why does the air conditioner not turn on on the polo. Why does the air conditioner on the polo sedan turn on right away

23.06.2020

There was a time when not many cars drove with closed windows. And, as a rule, their owners were wealthy people. Only they could afford comfort in the hottest time of the year. The present time dictates its own rules. And today, almost every car has built-in air conditioning and climate control. Volkswagen polo sedan cars of the new configuration are equipped with a climate control function, which fully justified itself in the first years of operation. Using it is a pleasure.

What is climate control

Climate control is a unit located in the front panel of the car. The appearance design is slightly different. The back part can protrude, subject to the placement of the board lying down, or be shorter. At the same time, the direction and connections in them are identical. They have the same connectors and are interchangeable. All blocks have the same functionality. Control can be either mechanical or sensor.

Between themselves, all the elements of climate control are connected by aluminum tubes. They create a sealed vicious circle. Therefore, when repairing malfunctions or scheduled diagnostics, special attention should be paid to those areas where there are bends. Since bends can disrupt the operation of the air conditioner and cause serious damage.

Problems during operation

No matter how many positive reviews are said about the system, but, like all equipment, it is characterized by breakdowns and malfunctions. When a function does not work, you need to diagnose and fix the breakdown. There are several typical reasons why problems arise in the operation of climate control in a Volkswagen Polo:

The circulation of coolant through the system is the main task of the compressor. With full operation, a click is heard when the air conditioner is turned on. When vibration appears or the clutch begins to creak, this is an occasion to diagnose and fix the breakdown. If there was no click, the liquid may have leaked out, the pressure sensor has broken, or the compressor has blocked.
Radiator corrosion. I recommend cleaning it at least once a year. Cleaning must be carried out carefully so as not to damage the ribs of the structure. Unfortunately, even careful washing cannot prevent corrosion. After a few years, small holes begin to appear. Having patched them, new ones are formed, in a different place.
Contamination of the coolant with dust and dirt in the unit and receiver connected to each other by a dryer. The process occurs due to the interaction of silica gel granules with the cartridge. When repairing the air conditioner, the filter must be changed.

System repair and diagnostics

Preventing damage is much easier than fixing it. Treatment of the system always begins with its diagnosis. In order to maintain climate control in working condition, you need to regularly clean the filter and change the fluid, according to the instructions.

The first thing to check in the air conditioner electronics is for faults. If there are errors, go to the measuring blocks and view the readings from blocks 11 to 16. Calculated and current values must match. If they float, the damper must be cleaned or replaced. When the temperature changes on the climate control, the damper value changes.

After that, adapt the climate control. It happens within 30 seconds. To implement it, you must select 1 in the basic parameters. Then read and turn it on.

If, during the diagnostic process, a compressor failure was detected, it can be solved with the help of a wizard on the observation deck. The coolant is removed from the system, the pads and wires are disconnected. It is worth paying attention to the condition of the belt and bracket. If they are worn out, they must be replaced. The Polo Sedan has an emergency valve for the compressor. When the pressure is significantly higher than normal or the sensor has stopped working, the valve is torn off and the coolant is taken out. Therefore, after repairing the breakdown, the valve must be changed. It is better to change parts for new ones, not used ones.

Refueling of the coolant must be carried out on time in specially designated valves. In addition, it is worth monitoring the interior air temperature sensor. It is important that dust and dirt do not get into its holes. This entails malfunctions and incorrect instrument readings.

Air conditioning system polo sedan compressor type. The heater units and the heat exchanger of the air conditioner evaporator are arranged in one block. The air conditioning system controls are located on a panel common with the heater controls.

A schematic diagram of the movement of the refrigerant in the air conditioning system is shown in the schematic figure below.

Schematic diagram of the movement of the refrigerant in the air conditioning system: 1 - combined pressure sensor; 2 - section of the high pressure pipeline; 3 - receiver-drier; 4 - service valve of the high pressure line; 5 - condenser (air conditioner radiator); 6 - fan of the condenser and radiator of the cooling system; 7 - air conditioning compressor; 8 - section of the low pressure pipeline; 9 - service valve of the low pressure line; 10 - heater fan; I - evaporator; 12 - thermostatic valve

The compressor is mounted on the engine block and is driven by a V-ribbed belt, the compressor circulates the refrigerant in the system. The compressor shaft is installed in the aluminum front housing cover on bearings and sealed from the side of the drive pulley with an oil seal.

The compressor drive pulley is mounted on two<рядном шариковом подшипнике и при работающем двигателе постоянно вращается крутящий момент передается от шкива к валу компрессора через ведомый диск.

NOTES

If the system is working properly, when the air conditioner is turned on, a click is heard - this is the clutch pressure plate, under the action of an electromagnet, engages with the drive pulley, and the compressor rotor begins to rotate.

But during the operation of the air conditioner, the following compressor malfunctions may occur.

1. If, when the air conditioner is turned off, the clutch makes extraneous sounds during rotation, heats up, or a burning smell appears, then its bearing has probably begun to collapse. In this case, the bearing must be replaced. In some advanced cases, it may be necessary to replace the compressor clutch assembly or its constituent parts.

2. If you don’t hear a click after turning on the air conditioner, then the following problems are possible:

there was a refrigerant leak, and the control system blocks the compressor from turning on;

the pressure sensor in the system has failed;

malfunctions in the electrical circuits of the control system;

the coil winding of the clutch electromagnet burned out;

the engine control unit for some reason (high engine coolant temperature, high engine speed) has blocked the compressor from turning on.

3. If the clutch rotates easily and freely, but when the air conditioner is turned on, extraneous noises are clearly audible or the engine even stalls, then the compressor is most likely stuck. The internal pump part of the compressor cannot be repaired. In this case, the compressor will have to be replaced.

4. And the last, most unpleasant option. A click is heard, the clutch easily rotates the compressor shaft, and there is no cooling of the air in the cabin. In this case, the compressor runs idle, pumping nothing. Only an experienced specialist with special control and diagnostic equipment can determine this malfunction.

The cause of the malfunction can be most accurately determined after a complete diagnosis in a specialized service center for the repair of automobile air conditioners.

An emergency pressure relief valve is installed at the bottom of the rear cover of the compressor. In the event of an increase in pressure in the system due to a failure of the pressure sensor or other emergency situations, when the set maximum pressure is exceeded, the valve membrane is destroyed and part of the refrigerant is released into the street. As a rule, after this, the emergency valve does not have sufficient tightness. Therefore, after eliminating the causes that caused the increase in pressure and the discharge of the refrigerant, the valve must be replaced.

WARNING

When the valve is actuated, the refrigerant is suddenly thrown out in strong jets in all directions. To prevent injury to people, it was closed with a cap.

Condenso p (air conditioning radiator) multi-flow type is located in front of the radiator of the engine cooling system. It is attached with brackets to the radiator of the cooling system. The condenser cells are made of flat thin-walled aluminum tubes with internal longitudinal baffles for rigidity and external fins to improve heat transfer. Tanks are aluminum, with flanges for connection of pipelines and a receiver. The tanks are divided into sections along the height, therefore, passing through the condenser, the refrigerant flow changes direction several times. In the condenser, the vapors of the refrigerant compressed by the compressor are condensed and the heat released in this case is removed into the surrounding air.

When the air conditioner is turned on, the engine control unit turns on the power supply circuit for the electric fan of the engine cooling radiator, which improves heat transfer in the condenser and reduces pressure in the air conditioner system.

Evaporator located in the cabin and air conditioning unit. The evaporator is made of aluminum tubes with external fins to improve heat transfer. Passing through the evaporator tubes, the boiling refrigerant actively absorbs heat from the air blowing over the outer finned surface of the tubes. The air is cooled and blown into the vehicle interior by a fan.

On the side surface of the evaporator there is a flange for mounting a thermostatic valve.

thermostatic valve block type located in the evaporator housing. The valve is attached to the pipelines and the evaporator using flange connections. After passing through the throttling hole in the valve body, the liquid refrigerant abruptly reduces its pressure and begins to boil. A regulating element is installed in the valve body, which changes the flow area of the throttling hole depending on the pressure and temperature of the refrigerant. The adjusting element is set at the factory and cannot be adjusted during operation.

Receiver dryer mounted on the condenser on the left side and is a collapsible unit. Inside the housing there is a filter element (cartridge) filled with desiccant (silica gel) granules. The liquefied refrigerant passing through the receiver is cleaned of possible impurities, dirt and moisture. In the upper part of the receiver housing there is a hole for replacing the filter element.

Pipelines connect all elements of the air conditioning system into a single sealed circuit. Pipelines and their fastening flanges are made of aluminum alloys.

Protect metal sections of pipelines from dents and kinks. Any narrowing of the flow area of the pipeline leads to a decrease in system performance.

To connect the mutually moving elements of the system, pipelines in some sections are equipped with flexible inserts (Fig. 12.3) made of synthetic materials.

At the junctions of individual elements of the system, O-rings round neoprene. During the repair of the system, when disconnecting sections of pipelines, sealing rings must be replaced. Tighten threaded pipe connections to the recommended torque. Weak or excessively strong tightening leads to deformation of the sealing surfaces and refrigerant leakage.

Service valves for connecting diagnostic and filling equipment are located on the pipelines.

The valves are closed with threaded caps to protect them from dirt.

The valves are equipped with spools, similar in design to the spools of the wheel tires, but differing from them in size.

A special key is used to turn the spools in and out.

Pressure meter installed in the engine compartment on the high pressure line pipeline.

Control unit panel the ventilation, air conditioning and heating system of the car is installed on the dashboard console.

Air temperature sensor in the cabin is located in the front panel of the control unit, if the car is equipped with a climate control system. To exclude incorrect readings of temperature values due to the influence of heated panel elements, the sensor is equipped with a forced airflow system. The system provides an even flow of air from the front of the vehicle through the sensor housing. For normal air movement, keep the sensor housing inlet free of any solid particles or liquids. This is especially true in cases of dry cleaning of the interior. When cleaning the interior with a vacuum cleaner, it is strictly forbidden to bring the suction tip of the vacuum cleaner pipe to the sensor inlet. If the air flow through the sensor housing is obstructed, the normal functioning of the automatic climate control system is disrupted.

Outside temperature sensor, although located at the front of the vehicle behind the grille in a sun-protected and ventilated area, is affected by factors such as warm air from the engine and radiation from hot asphalt. Therefore, his readings can sometimes be somewhat overestimated, especially after a long idle time in traffic jams. The outdoor temperature readings can be considered correct when driving at a speed of at least 40 km/h for at least 10 minutes.

To improve the efficiency of the climate control system and more comfortable distribution of air flows in the cabin, a solar light sensor is installed. Depending on the degree of heating of the cabin by the rays of the sun, according to the signals of the sensor, air flows are directed to the area of \u200b\u200bthe head or legs of the driver and front passenger. The sensor is located on the instrument panel near the windshield glass.

Coolant. The system is charged with HFC134a (R134a) refrigerant. A special oil has been added to the refrigerant to lubricate the compressor. It is strictly forbidden to use other types of refrigerants and oils in the system.

Schematic diagram of the movement of air flows in the heating system Polo sedan, air conditioning and ventilation: 1 - windshield vents; 2 - dampers for the distribution of air flows to the windshield deflectors and instrument panel deflectors; 3 - instrument panel deflectors; 4 - air ducts for heating the foot area of the driver and passengers; 5 - damper for distributing air flows to the instrument panel deflectors and air ducts for heating the driver's and passengers' footwells; b - heater radiator; 7 - cabin air filter; 8 - damper of the air recirculation system; 9 - air intake box; 10 - air intake in the passenger compartment; I - fan impeller; 12 - fan motor; 13 - air conditioner evaporator; 14 - drainage hole for draining condensate; 15 - damper of the temperature controller; 16 - housing block of the heating and air conditioning system

The heating, air conditioning and ventilation system is a single complex that provides the most comfortable conditions in the car, regardless of weather conditions and driving conditions. The system includes a heater (increases the air temperature in all operating modes of the system), an air conditioner (reduces air temperature and humidity), an air blower (fan) and air ducts with a filter (provide air exchange in the cabin, clean the air from dust), as well as a control unit ( controls all elements of the system to obtain the specified comfort parameters).

The car is equipped with a liquid-type interior heater.
The heater radiator is connected to the engine cooling system by two hoses running in the engine compartment.

The radiator is placed in a plastic casing of the climatic unit, installed under the central part of the instrument panel. The main components of the heater:

Heat exchanger (radiator) 6 of the heater, designed to heat the air entering the passenger compartment with the heat of the engine cooling liquid;

fan (air blower) 11;

For clarity, it is shown with the grilles of the air intake duct and air intake removed.

Fan motor 12 with permanent magnet excitation, providing a controlled supply of outside air to the heater and air conditioning dampers. To obtain different values of the fan speed, a block of additional resistors is installed in the power supply circuit of the electric motor;

Damper 15 of the air temperature regulator coming from the heater to the passenger compartment. The amount of air passing through the heat exchanger of the heater and the amount of outside air passing through the heat exchanger depends on the change in its position;

Flaps 2 for distributing air from the heater through air ducts to the passenger compartment or for blowing the windshield.

FEATURES OF THE AIR CONDITIONING SYSTEM DEVICE

On Volkswagen Polo sedan cars, a compressor-type air conditioning system is installed. The heater units and the heat exchanger of the air conditioner evaporator are arranged in one block. The controls for the air conditioning system are located on a panel shared with the heater controls.

The compressor is mounted on the engine block and is driven by a V-ribbed belt. The compressor circulates the refrigerant in the system. The compressor shaft is installed in the aluminum front housing cover on bearings and sealed from the side of the drive pulley with an oil seal. The compressor drive pulley is mounted on a double-row ball bearing and constantly rotates when the engine is running. Torque is transmitted from the pulley to the compressor shaft through the driven disk.

Schematic diagram of the movement of the refrigerant in the air conditioning system: 1 - combined pressure sensor; 2 - section of the high pressure pipeline; 3 - receiver-drier; 4 - service valve of the high pressure line; 5 - condenser (air conditioner radiator); b - fan of the condenser and radiator of the cooling system; 7 - air conditioner compressor; 8 - section of the low pressure pipeline; 9 - service valve of the low pressure line; 10 - heater fan; I - evaporator; 12 - thermostatic valve

If the system is working properly, when the air conditioner is turned on, a click is heard - this is the clutch pressure plate, under the action of an electromagnet, engages with the drive pulley, and the compressor rotor begins to rotate.

But during the operation of the air conditioner, the following compressor malfunctions may occur.

1. If, when the air conditioner is turned off, the clutch makes extraneous sounds during rotation, heats up, or a burning smell appears, then its bearing has probably begun to collapse. In this case, the bearing must be replaced. In some advanced cases, it may be necessary to replace the compressor clutch assembly or its constituent parts.

2. If you don’t hear a click after turning on the air conditioner, then the following problems are possible:

A refrigerant leak has occurred and the control system is blocking the compressor from turning on;

The pressure sensor in the system has failed;

Malfunctions in the electrical circuits of the control system;

The coil winding of the clutch electromagnet burned out;

The engine control unit for some reason (high engine coolant temperature, high engine speed) has blocked the compressor from turning on.

3. If the clutch rotates easily and freely, but when the air conditioner is turned on, extraneous noises are clearly audible or the engine even stalls, then most likely it is jammed

Compressor. The internal pump part of the compressor cannot be repaired. In this case, the compressor will have to be replaced.

4. And the last, most unpleasant option. A click is heard, the clutch easily rotates the compressor shaft, and there is no cooling of the air in the cabin. In this case, the compressor runs idle, pumping nothing. Only an experienced specialist with special control and diagnostic equipment can determine this malfunction.

The cause of the malfunction can be most accurately determined after a complete diagnosis in a specialized service center for the repair of automobile air conditioners.

When the valve is actuated, the refrigerant is suddenly thrown out in strong jets in all directions. To prevent injury to people, it was closed with a cap.
The condenser (air conditioner radiator) of a multi-flow type is located in front of the radiator of the engine cooling system. It is attached with brackets to the radiator of the cooling system. The condenser cells are made of flat thin-walled aluminum tubes with internal longitudinal baffles for rigidity and external fins to improve heat transfer. Tanks are aluminum, with flanges for connection of pipelines and a receiver. The tanks are divided into sections along the height, therefore, passing through the condenser, the refrigerant flow changes direction several times. In the condenser, the vapors of the refrigerant compressed by the compressor are condensed and the heat released in this case is removed into the surrounding air.

At least once a year, preferably before the start of summer operation, wash the fins A of the condenser honeycombs from adhering dirt, dust and anti-icing agents B. This will improve heat transfer, reduce pressure in the system and increase the service life of the system elements.

Do not use high pressure water jets to clean the condenser. This can cause damage to the B thin-walled fins. Even with regular washing, the need to replace the condenser occurs much more often than we would like. The fact is that he is the first to take on the flow of anti-icing reagents, dirt and pebbles from the road. And its tube walls are thin ... In most cases, the condenser is damaged by corrosion in the third or fourth year of operation.

If the tightness of the condenser is broken as a result of corrosion, then it is more expensive to repair it. Even if the master of argon welding manages to patch the hole, a leak may soon appear elsewhere. By the way, the pressure in the system on hot days can reach up to 25-28 bar.

In addition, the complex structure of the condenser tube should be taken into account: along it is divided into channels by partitions, so it is highly likely that after welding, some of the channels will be blocked. Accordingly, the dissipated power will drop and the operation of the air conditioner will deteriorate, especially in traffic jams and in hot weather.

After each experiment with condenser patching, you will need to pay for removal-installation, welding of the condenser and charging the system with refrigerant. So it is better to immediately install a new condenser. Instead of an expensive original one, it is quite possible to buy a cheaper condenser from authorized spare parts manufacturers.

The evaporator is located in the cabin heating and air conditioning unit. The evaporator is made of aluminum tubes with external fins to improve heat transfer. Passing through the tubes of the evaporator, the boiling refrigerant actively absorbs heat

From the air blowing over the outer finned surface of the tubes. The air is cooled and blown into the vehicle interior by a fan.

When the air passing through the evaporator is cooled, the water vapor contained in it condenses.

Condensate through a drain pipe connected to the body of the heating unit...
... and brought out through a plastic adapter at the bottom of the right side of the engine shield, merges under the bottom of the car. If the ambient humidity is high, a puddle of water may form under the car, which is an indirect sign of the health of the air conditioning system.

During the operation of the car, particles of road dust and dirt settle on the outer surface of the evaporator that is wet from condensate.
This layer becomes an excellent environment for life and rapid reproduction of putrefactive bacteria and fungal cultures. Over time, an unpleasant odor develops in the car. It is especially strong when the air conditioner is turned off and in humid weather. In order to minimize the risk of this problem, when buying a new car, it is necessary to carry out preventive treatment of the evaporator with special chemicals, regularly replace the cabin filter and clean the drain tube. If, despite the measures taken, the smell still appears, contact a specialized car air conditioning repair service to disinfect or flush the evaporator. In case of very strong contamination, the evaporator will have to be replaced.

On the side surface of the evaporator there is a flange for mounting a thermostatic valve.

The block-type thermostatic valve is located in the evaporator body. The valve is attached to the pipelines and the evaporator with flange connections. After passing through the throttling hole in the valve body, the liquid refrigerant abruptly reduces its pressure and begins to boil. A regulating element is installed in the valve body that changes the flow area of the throttling hole depending on the pressure and temperature of the refrigerant. The adjusting element is adjusted at the factory and cannot be adjusted during operation.

The receiver-drier is installed on the condenser on the left side and is a collapsible unit. Inside the housing there is a filter element (cartridge) filled with desiccant (silica gel) granules. The liquefied refrigerant passing through the receiver is cleaned of possible impurities, dirt and moisture. In the upper part of the receiver housing there is a hole for replacing the filter element.

In case of repair or replacement of elements of the air conditioning system, if it was in an open state (any components were removed, pipelines were destroyed, etc.), the cartridge of the receiver-drier must be replaced. Otherwise, after charging the system, the refrigerant will not dry out and acids may form inside the system, which will destroy the parts of the air conditioner from the inside.

The design of the flexible insert hose: 1 - outer protective sheath; 2 - fabric cord of the power frame; 3 - plastic sealing layer; 4 - inner oil-resistant layer

Pipelines connect all elements of the air conditioning system into a single sealed circuit. Pipelines and their fastening flanges are made of aluminum alloys.
Protect metal sections of pipelines from dents and kinks. Any narrowing of the flow area of the pipeline leads to a decrease in system performance.

To connect the mutually moving elements of the system, pipelines in some sections are equipped with flexible inserts made of synthetic materials.

O-rings made of neoprene are installed at the joints of the individual elements of the system. During the repair of the system, when disconnecting sections of pipelines, sealing rings must be replaced. Tighten threaded pipe connections to the recommended torque. Weak or excessively strong tightening leads to deformation of the sealing surfaces and refrigerant leakage.

Service valves for connecting diagnostic and filling equipment are located on the pipelines.

This is how the service valves of the high A and low B pressure lines are located on the pipelines.
The valves are closed with threaded caps to protect them from dirt.
The valves are equipped with spools, similar in design to the spools of the wheel tires, but differing from them in size.

A special key is used to turn the spools in and out.

It is forbidden to check the presence of refrigerant in the system by pressing the spools of the service valves, since after such a check the valve spool may not close completely and the refrigerant will leak from the system!

The pressure sensor is installed in the engine compartment on the high pressure line.

According to the sensor signals, the electronic engine control unit turns off the air conditioning compressor in case of depressurization of the system or an emergency increase in pressure in it in order to protect the compressor from overloads.
The panel of the control unit for the ventilation, air conditioning and heating system of the car is installed on the console of the instrument panel.

Cabin air temperature sensor

It is located in the front panel of the control unit if the car has a climate control system. To exclude incorrect readings of temperature values due to the influence of heated panel elements, the sensor is equipped with a forced airflow system. The system provides an even flow of air from the front of the vehicle through the sensor housing. For normal air movement, keep the sensor housing inlet free of any solid particles or liquids. This is especially true in cases of dry cleaning of the interior. When cleaning the interior with a vacuum cleaner, it is strictly forbidden to bring the suction tip of the vacuum cleaner pipe to the sensor inlet. If the air flow through the sensor housing is obstructed, the normal functioning of the automatic climate control system is disrupted.

The outside temperature sensor, although located at the front of the vehicle behind the grille in a sun-protected and ventilated area, is affected by factors such as warm air from the engine and radiation from hot asphalt. Therefore, his readings can sometimes be somewhat overestimated, especially after a long idle time in traffic jams. The outdoor temperature readings can be considered correct when driving at a speed of at least 40 km/h for at least 10 minutes.
To improve the efficiency of the climate control system and more comfortable distribution of air flows in the cabin, a solar light sensor is installed. Depending on the degree of heating of the cabin by the rays of the sun, according to the signals of the sensor, air flows are directed to the area of \u200b\u200bthe head or legs of the driver and front passenger. The sensor is located on the instrument panel near the windshield glass.

Coolant. The system is charged with HFC134a (R134a) refrigerant. Special oil has been added to the refrigerant to lubricate the compressor. It is strictly forbidden to use other types of refrigerants and oils in the system.

During the operation of a car air conditioner, situations periodically arise when maintenance of the air conditioning system or its repair is required. For this, modern diagnostic and repair equipment is used. The most common situation is the depressurization of the system and the release of refrigerant from it.

To detect leaks, highly sensitive halogen leak detectors with sound indication are used.

In some difficult cases, the so-called method is used. ultraviolet diagnostics of air-conditioning system tightness.

The method consists in the fact that a special dye is introduced into the system in microdoses.

In places of microflows, the dye, together with the refrigerant, gradually comes to the outer surface of the system elements.
During the inspection of the system, the dye begins to glow (fluoresce) under the action of ultraviolet rays of a special lamp ...
...and refrigerant leaks become visible.

It should be noted that the dye does not have any negative effect on the system. It can be in the refrigerant and circulate through the system for an arbitrarily long time and serve its purpose only when a leak occurs.

After repairing the air conditioner, it is necessary to evacuate and charge the system with the appropriate refrigerant (R134a). The volume of refueling of the car air conditioner for each car model is individual.

To carry out high-quality refueling of a car air conditioner, you need:

Precision gauge blocks with special connection tips:

Two-stage vacuum pump for complete removal of air and water vapor from the system;
- high-precision (division value no more than 5 g) scales for dosing the charged refrigerant.
Due to the specific features of the repair of the air conditioning system, this section describes only the work on the removal and installation of individual elements and the system control unit. Work related to charging the system with refrigerant should be carried out in specialized service centers.

The air conditioning system is charged with high pressure refrigerant. Contact of liquid refrigerant on human skin causes severe frostbite, so all work related to maintenance, repair or dismantling of air conditioning system elements should be carried out, if possible, in specialized service centers equipped with professional technological equipment. When working on your own, take precautions.

FEATURES OF THE VENTILATION SYSTEM DEVICE

The vehicle is equipped with a supply and exhaust type ventilation system. Outside air can enter the passenger compartment through the door windows with the windows down...

And through the grille of the air intake box located in front of the windshield into the air intake. The air from the air intake is supplied through air ducts to the vehicle interior through the windshield blower nozzles, side and central nozzles, through the lower nozzles of the heater housing.

The air entering the car from the street is cleaned of dirt and pollen particles in the cabin air filter, located in the climate unit housing.
The filter element of the air filter must be replaced in accordance with the timing of preventive maintenance. Exhaust ventilation is carried out through the grilles, which are made in the rear lining of the trunk.

When placing cargo in the trunk, if possible, try not to block the ventilation grilles, leave a small gap between the luggage and the trim panel. Efficient operation of the exhaust ventilation improves the temperature in the cabin and reduces the formation of condensation on the windows.

From the side of the street, the exhaust ventilation openings are closed by deflectors with petal flaps, which are installed in the rear part of the body, in the cavity of the rear bumper (view with the rear bumper removed).

SAFETY REGULATIONS FOR REPAIR AND MAINTENANCE OF THE AIR CONDITIONING SYSTEM

1. Refrigerant is a chemical compound that must be handled with care to avoid harm to health.

2. Work in a well-ventilated area and avoid breathing refrigerant vapors.

3. When performing work related to the depressurization of the air conditioning system, always wear safety goggles and wrap fittings, valves and connections with a clean cloth.

4. It is forbidden to carry out welding work on the car near the units and pipelines of the air conditioning system.

5. It is forbidden to bend the flexible inserts of pipelines (hoses) with a radius less than four diameters of the flexible insert.

6. Hoses should be regularly inspected for cracks and fraying.

7. Before disconnecting the pipelines of the air conditioning system, all refrigerant must be removed from it.

8. Unscrew the threaded connections of the system elements slowly. Keep your face and hands away from the disconnect point to avoid injury if there is liquid refrigerant in the system.

9. If pressure is detected in the system during the disconnection of pipelines, it is necessary to remove the refrigerant from it

10. After disconnecting any section, immediately close the holes with caps or tape. This will prevent moisture and dirt from entering the system, which could cause failure of the compressor pump part.

The situation is the following: when you press the button, it lights up, but there is no corresponding sound of switching on. The air is blowing not cool. I checked the fuses in the cabin, numbers 22 and 25, both intact.

Already signed up for an official. Who is thinking about this? And yet, a week ago I set the alarm, could the installers mess up there somehow?

Volkswagen Polo Sedan 2012, 105 l. With. - electrical and electronics

25

Guys, while I was on the go, when I was driving with an air conditioner to the salon, there was a pungent smell like log wiring and the air conditioner finished working. Who is thinking?

Hello. And at the moment I have the same thing, the smell of something burnt went on and then I found that the climate did not cut it. What was wrong with you. Temperature outside 7. had to turn on.

The air conditioner compressor is dead. I didn’t clean the radiator just right, it got clogged, eventually the system overheated, excess pressure and this is the result! Now the radiator and compressor are to be replaced. Although the radiator may be washed off!

Good time of day. He does not plow you, The temperature does not affect the operation of the air conditioner.

but at the sink, when the car warmed up, I heard the condo cut in and the air blew cool.

A/C compressor clutch does not engage. There is no mass on the air conditioning compressor

Not compressor clutch cuts air conditioner. On the compressor air conditioner no mass. VW Golf 4, Passat, Polo, Bora.

vw polo sedan air conditioner does not cool well) hot air damper!

Try turning it on again. The handle is all on the glass (up), press the a / s button. If it starts up, there will be a characteristic click. Look at the compressor, the pulley should be spinning, the engine speed will drop slightly, the evaporator fan will turn on. (depending on temperature) If you have it, then everything is fine. There will be a question in the cold, write

Hello, tell me the same story, the indicator lights up but does not turn on and there is no characteristic click, where to go to look, maybe there is a relay?

Infa was confirmed, checked at the sink. The condo turns on and works))

Check the freon pressure in the circuits. Please describe the problem in more detail.

I think I'll figure it out 100% works he or not)

It was like that for me in the spring, but the degree was 10 somewhere, rains, slush. In the morning I started everything working, drove to my mother-in-law, went to her for half an hour, then went out, started it, drove off and I feel really stuffy and terrible and the windows are sweating. I let's poke the kondeya button (I have slim control), but nothing happened! In the evening I climbed into the Internet, and I just didn’t read a hundred there, I also decided to sign up for the service in short! BUT! Starting the car in the morning, I was pleasantly surprised works🙂

Well, right now it shows -3, tomorrow if it's the same I'll go to the garage and check it there.

below 4 will not turn on.

Where does such information come from?

how many degrees outside? after 0 degrees it will not turn on.