Heating, air conditioning and ventilation device Grants

If your LADA Granta has any problems with the heater , ventilation ( windows sweat ) or air conditioning, then before going to the service, try to find out the reason yourself. And the study should begin with the installation of heating, air conditioning and ventilation.

The heating (air conditioning) and air ventilation system operates effectively when the windows are closed and is a single complex that provides the most comfortable conditions in the car, regardless of weather conditions and ambient temperature. The system includes:

A heater that increases the air temperature in any operating mode of the system;
Air conditioning, which reduces the temperature and humidity;
Control unit for mixing cold and hot air to achieve the required temperature in the cabin.

The complex provides low-inertia regulation of air temperature, practically independent of vehicle speed. The amount of air entering the cabin is mainly determined by the operating mode of the fan, so it must be turned on even while driving at high speed.

Outside air can enter the cabin through the door windows when the windows are down and the air blower, the air intake of which is located in front of the windshield. Air from the air blower enters the vehicle interior through the windshield blower nozzles, side and central nozzles, as well as through the lower nozzles of the heater housing.

Air distribution of heater/air conditioner and ventilation of LADA Granta

Fig. 1 : Distribution of air flows from deflectors and air ducts of the heating (air conditioning) system and ventilation of the LADA Granta interior.

The following air flow distribution elements are located in the cabin:

front door glass blower nozzles;
side air supply nozzles to the driver and passenger in the front seat or to the front door windows;
windshield blower nozzles;
central air supply nozzles to the cabin;
air ducts supplying air to the feet of passengers in the rear seat;
air ducts for supplying air to the driver's and front passenger's footwells.

The quantity, temperature, direction and intensity of air flows are controlled by switches installed in the system control unit.

LADA Granta climate system control unit

Fig. 2 : LADA Granta climate unit not equipped with air conditioning. 1 — fan operating mode switch; 2 — temperature regulator for air supplied to the cabin; 3 — block of push-button switches; 4 — regulator for the distribution of air flows supplied to the cabin; 5 - control lever for the recirculation system

Fig. 3 : LADA Granta climate unit with air conditioning. 1 — fan operating mode switch; 2 — temperature regulator for air supplied to the cabin; 3 — block of push-button switches; 4 — regulator for the distribution of air flows supplied to the cabin; 5 - control lever for the recirculation system

The following switches and regulators are installed in the control units: 1) Fan operating mode switch . To increase the intensity of air supply to the passenger compartment while driving and to ensure air supply when the vehicle is stationary, use the switch handle to set one of the four operating modes of the air blower fan. 2) Temperature regulator for air supplied to the cabin . To change the temperature of the air entering the cabin, rotate the temperature control knob. The blue part of the scale corresponds to the supply of the most cooled air, the red part to the supply of the most heated air. When the handle is in the middle position, air is supplied to the cabin at ambient temperature. On a car equipped with air conditioning, the system also provides an automatic mode for maintaining the set temperature in the cabin. 3) Block of push-button switches . Depending on the configuration, the unit can be equipped with: 4) A regulator for the distribution of air flows supplied to the cabin . To change the direction of air supply, use the control knob to select one of four options (clockwise):

air supply to the windshield (through the windshield blower nozzles);
air supply to the upper part of the cabin (through the side and central nozzles of the instrument panel);
air supply to the lower part of the cabin (through the lower nozzles of the heater housing);
air supply to the lower part of the cabin and to the windshield (through the lower nozzles of the heater housing and the windshield blower nozzles).

5) Recirculation system control lever . To turn on the recirculation mode, move the lever to the extreme right position. When the recirculation mode is turned on, outside air does not enter the cabin, and the air blower fan circulates air inside the cabin. This mode is used to quickly warm up the interior in the cold season, as well as when the surrounding air is dusty and gassy.

WARNING

It is not recommended to turn on the recirculation mode for a long time while the car is moving, as this usually leads to fogging of the windows.

— rear window defroster switch. When you press the button, the rear window heater turns on and the heater on indicator on the button lights up;

NOTE

In a variant, when the heated rear window is turned on, the heated exterior rear view mirrors are also turned on.

— the windshield heated switch is used to quickly remove frost and moisture from it. When you press the button, the windshield heater turns on and the heater on indicator on the button lights up. The system operates only when the engine is running.

The system turns off:

automatically after 6 minutes;
when you press the switch key again during heating;
when the voltage in the on-board network drops below the permissible level;
when engine speed decreases below permissible limits;
when the ignition is turned off;

- air conditioner switch. To cool the air entering the car interior, press the air conditioning button and the indicator will light up. To turn off the air conditioner, press the button again.

NOTE

The air conditioner will not turn on if the air blower fan mode switch is set to position “O” (fan off) or the ambient air temperature is below O 'C. This is not a sign of a malfunction, but is provided for by the design.

Reviews

№	Positive
1.	Vladimir: Six months have passed since we bought the car, and there have been no breakdowns in such a short time. The fan refused to start several times, the reason turned out to be a bad fuse contact.
2.	Vasily: I have been actively using the machine for two years, there are no particular complaints, all units are working as normal. Breakdowns happen, like everyone else, but they are minor and can be easily fixed on your own.
3.	Gennady: after two months of the machine being idle, the stove heater began to supply little air. I disassembled it myself, cleaned it, works properly. My recommendations to car enthusiasts: don’t be afraid to repair them yourself.
4.	Kirill: I think that Granta is put together with high quality, the price is affordable for a family with an average income. Provided timely maintenance, no problems arise.
5.	Ivan: after buying the car, I immediately drained the factory antifreeze and bought good imported antifreeze. Now I don’t know any grief, the stove works like a charm.
6.	Dmitry: there were minor defects, I fixed them myself, but they were insignificant and did not affect the performance of the machine.
7.	Igor: I’m happy with the car, there are no major comments, as for domestic transport it’s very good.
Negative
1.	Victor: Over the two years of active use of the car, I contacted the service station several times under warranty. The fan malfunctioned, then the stove heater. Decided to renovate and sell. Renault Logan is several times better than its domestic counterpart.
2.	Vladlen: I’m dissatisfied with Grant’s purchase, I’ve already regretted wasting money several times. The car is not worth the investment.
3.	Gennady: a year and a half since purchasing the car, constant investments, purchase of consumables, repairs at service stations.

Conclusion The stove heating system of the Lada Granta is completely copied from the Lada Kalina. There are no complaints about the equipment, everything works properly. In order for the mechanism to serve for a long time, it is necessary to systematically carry out inspection and prevention.

Many motorists save on maintenance, as a result of which the service life is reduced. An important factor is the cloudiness of the antifreeze. The manufacturer recommends replacing it every 75,000 km. Exceeding the interval causes deposits to form at the bottom of the radiator and corrosion begins.

Source

Interior ventilation

To ventilate the interior, set the ventilation and heating control unit controls to the following positions.

Turn control knob 2 to the minimum temperature position (see Fig. 1 and 2).
Place the regulator handle 4 opposite the pictogram.
Open the nozzles on the instrument panel.
Set the desired air supply speed with switch 1.
If the windshield fogs up, set the regulator handle 4 opposite the pictogram.

Preventing glass fogging

When the air humidity is high (during heavy rain), the car windows may fog up. To prevent the windshield and front door windows from fogging up, do the following:

Turn regulator handle 2 to the middle position.
Place the regulator handle 4 opposite the pictogram.
Move switch 1 of the electric fan operating modes to position “2”.
To prevent the rear window from fogging up, press the button in the 3-button switch block.

Quick heating of the interior

To do this, do the following:

Turn control knob 2 to maximum heat.
Place the regulator handle 4 opposite the pictogram -
Switch the operating mode switch 1 of the electric heater fan to position “3”.
Open the side and center vents on the instrument panel.
Set lever 5 to the extreme right position - no outside air enters the cabin (recirculation mode).

WARNING

It is not recommended to turn on the recirculation mode for a long time while the car is moving, as this usually leads to fogging of the windows.

Possible faults

When operating an air conditioner, owners may experience a number of problems, in particular: loud noise, poor cooling, or problems turning on the air conditioner. If you happen to encounter something similar, do not be upset ahead of time - you yourself can determine the cause of the breakdown. How to reliably find out whether the air conditioner is really malfunctioning?

Compare the difference in air temperature outside with the temperature reading obtained after operating the air conditioner, and if the resulting difference is 5 degrees or more, the device is faulty.

Another clear sign of a breakdown will be the absence of backlight on the air conditioner switch. There is other evidence of disruption of its functioning. For example, the clutch often breaks, making it impossible to start the equipment. In addition, the compressor installed on your car may also jam; in this case, the clutch will continue to rotate, but it will be accompanied by distinct clicks.

Another sign of a possible malfunction is the slight rotation of the compressor shaft after turning on the air conditioning system, and the simultaneous absence of cooled air. Such a violation indicates that there is no refrigerant in the system and is confirmed by diagnostics carried out at one of the service centers.

How to independently check the efficiency of the Lada Granta air conditioner?

Self-checking the effectiveness of the climate system is quite simple. All you need to do is turn on the air conditioning in your car and focus on the following aspects:

Normally, switching on is necessarily accompanied by a click, which indicates that the pressure disk has engaged with the drive pulley and that the compressor rotor has begun to rotate.
At the same time as the air conditioner, the electric fan of the cooling system must also turn on.
At the same time, the temperature of the air flows coming from the air ducts begins to decrease. If nothing like this happens, it is necessary to check the condition of the accessory drive belt.

The absence of a click when the climate system is turned on may indicate several violations in its operation, namely:

About a freon leak causing the compressor to be blocked from starting.
About the breakdown of the pressure sensor.
About the presence of a malfunction in electrical circuits.
About a possible break in the electrical circuit of the clutch coil winding.
About blocking the start of the compressor for other reasons (for example, due to a dead battery).

The presence of any extraneous noise most often signals the beginning of destructive processes in the air conditioner clutch bearing. At the same time, it can get very hot, and then you will feel a specific smell.

If the clutch rotates freely, accompanied by extraneous noise (the engine often stalls), we are most likely talking about a jammed compressor. Its internal filling cannot be repaired, and therefore will have to be replaced.

Sometimes car enthusiasts note rotation of the compressor shaft and the simultaneous absence of even the slightest cooling of the air. In such a situation, only a specialist can determine the possible cause of the malfunction.

In addition, the cause of malfunction of the air conditioning system can be contamination of the condenser, and therefore you should not refuse its regular maintenance. But a weak air supply most often indicates problems with the cabin air filter.

Do not forget that all work on repair, maintenance and dismantling of air conditioners is recommended to be entrusted to professionals and carried out only in service centers. Car owners are advised to only clean air conditioning systems themselves. Such precautions are due to the fact that even a slight contact of freon on the skin will cause serious frostbite.

How to check the efficiency of an air conditioner using a table

To carry out such a test you will need a thermometer. The order of your actions should be as follows:

First, start the engine;
Then the air conditioner is turned on and set to the lowest possible temperature;
Set the blowing speed to maximum;
The air flow should be directed “into the face”;
After this, the thermometer is installed in the central air duct;
The idle speed must be increased to two thousand per minute;
Wait until the temperature indicated by the thermometer begins to decrease.

Then check the data you received with the information given in the table below:

If the temperature readings you received differ significantly from those shown in the table, start looking for the reasons for this phenomenon. Often they lie in low refrigerant content, the amount of which can decrease by 15% per year.

Capacitor check

The condenser is located in front of the radiator; during its operation, especially in summer, it becomes very dirty. The accumulation of pollution leads to disruption of heat exchange processes, and this negatively affects the operation of the entire climate system. Checking the condenser consists of a visual inspection by the car owner, which is carried out through the lower radiator grille. If there is serious contamination, it is strongly recommended to clean the radiator using compressed air or a brush.