Heating, air conditioning and ventilation of Toyota Corolla

The ventilation, heating and air conditioning system installed on the car works effectively with the windows closed and is a single complex that provides the most comfortable conditions in the car, regardless of weather conditions and ambient temperature. The temperature in the cabin is regulated by mixing cold and hot air. The cooling unit of the air conditioning system reduces the temperature and humidity of the air, cleans it from dust. The heater increases the air temperature in all operating modes of the system. The complex provides low-inertia regulation of the air temperature, practically independent of the vehicle speed. The amount of air entering the passenger compartment is mainly determined by the operating mode of the fan, so it must be turned on even when driving at high speed. Outside air can enter the passenger compartment through the door windows when the windows are lowered and the air blower located in front of the windshield. Air from the blower can enter the vehicle interior through the windscreen blowing nozzles, side and center nozzles, through the front door glass blowing channels and through the lower nozzles of the heater housing. The amount, temperature, direction and intensity of air flows are regulated by switches installed in the control unit for the heating, air conditioning and ventilation system. Depending on the equipment on the vehicle, the following applies: through the channels for blowing the windows of the front doors and through the lower nozzles of the heater housing. The quantity, temperature, direction and intensity of air flows are controlled by switches installed in the control unit for the heating, air conditioning and ventilation system. Depending on the equipment on the vehicle, the following applies: through the channels for blowing the windows of the front doors and through the lower nozzles of the heater housing. The quantity, temperature, direction and intensity of air flows are controlled by switches installed in the control unit for the heating, air conditioning and ventilation system. Depending on the equipment on the vehicle, the following applies:

- automatic control:

- manual control of the heating (air conditioning) and interior ventilation system.

The automatic system is functionally similar to the manual system. The differences lie in the ability to automatically maintain the set temperature in the car. The automatic control unit for the heating, air conditioning and ventilation system of the passenger compartment includes the following controls:

• 1 - temperature regulator key;
• 2 - key for turning on the recirculation mode;
• 3 - display of temperature settings;
• 4 - automatic mode key;
• 5 - air conditioner switch.

To cool the air entering the car, press the air conditioner button - the yellow indicator will light up in it. To turn off the air conditioner, press the button again;

Note:

When the air conditioner is turned on, especially in the hot season, the moisture contained in the air supplied to the heat exchanger condenses on it, drains off the evaporator and is removed from the heater block through a special hole. The air conditioner will not turn on if the air blower fan operating mode switch is set to “0” (fan off) or the ambient temperature is below 0 ° C. This is not a malfunction, but is designed by design.

Warning:

Turning on the air conditioner while the engine is running in difficult conditions (long climbs, heavy city traffic, etc.) may cause the engine to overheat. Watch the indication of the coolant temperature gauge: if the temperature exceeds the permissible value, turn off the air conditioner. During long journeys in city traffic, the efficiency of the air conditioner may decrease due to the intense thermal conditions of the engine. This is not a malfunction, and the air conditioner will operate efficiently under normal road conditions.

• 6 - air flow control display;
• 7 - fan speed display;
• 8 - heated windshield;
• 9 - fan speed regulator key;
• 10 - key for turning on the heating of the rear window and outside rear-view mirrors. To turn on the heating of the rear window and rear-view mirrors, press the power button - the yellow indicator will light up in it.

To turn off the heating, press the button again;

Note:

In a variant version of the car, the heating of the rear window and rear-view mirrors can be equipped with an automatic timer, which switches off automatically after 15 minutes.

• 11 - air flow control key;
• 12 - fan switch.

The manual control unit for the heating, air conditioning and ventilation system of the Toyota Corolla includes the following controls:

1 - regulator of distribution of flows of air supplied to the passenger compartment. To change the direction of air flow, use the control knob to select one of five options (clockwise):

• - air supply to the upper part of the cabin;
• - air supply to the upper and lower parts of the passenger compartment;
• - air supply to the lower part of the passenger compartment;
• - air supply to the lower part of the passenger compartment and to the windshield;
• - air supply to the windshield.

2 - fan operating mode switch. To increase the intensity of air supply to the passenger compartment while driving and to provide air supply when the vehicle is stationary, use the switch knob to set one of the four operation modes of the air blower fan.

3 - temperature regulator of the air supplied to the passenger compartment. To change the temperature of the air entering the passenger compartment, turn the temperature control knob. The blue part of the scale corresponds to the supply of the most cooled air, the red part of the scale corresponds to the supply of the most heated air.

With the handle in the middle position, air is supplied to the passenger compartment at ambient temperature.

4 - air conditioner switch. To cool the air entering the car interior, press the air conditioner start button - the yellow control lamp will light up in it.

To turn off the air conditioner, press the button again.

Note:

When the air conditioner is turned on, especially in the hot season, the moisture contained in the air supplied to the heat exchanger condenses on it, drains from the evaporator and is removed from the heater block through a special hole. The air conditioner will not turn on if the air blower fan operating mode switch is set to “0” (fan off) or the ambient temperature is below 0 ° C. This is not a malfunction, but is designed by design.

Warning:

Turning on the air conditioner while the engine is running in difficult conditions (long climbs, heavy city traffic, etc.) can cause the engine to overheat. Watch the indication of the coolant temperature gauge: if the temperature exceeds the permissible value, turn off the air conditioner. During long journeys in city traffic, the efficiency of the air conditioner may decrease due to the intense thermal conditions of the engine. This is not a malfunction, and the air conditioner will operate efficiently under normal road conditions.

5 - key for heating the rear window and outside rear-view mirrors. To turn on the heating of the rear window and rear-view mirrors, press the power button - the yellow indicator will light up in it. Press the button again to turn off the heating.

6 - key for turning on the recirculation mode. To turn on the recirculation mode, press the power button - the yellow indicator will light up in it. Press the button again to turn off the recirculation mode.

When the recirculation mode is on, the outside air does not enter the passenger compartment, and the air blower fan circulates the air inside the passenger compartment. This mode is used to quickly warm up the passenger compartment in the cold season, as well as when the ambient air is dusty and gassed.

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.

Depending on the various combinations of switching on the control unit switches, the heating and ventilation system of the Toyota Corolla interior operates in the following main modes:

- The maximum cooling mode is used in hot weather and after a long stay in the sun, to quickly cool the air in the cabin. In this case, before turning on the air conditioner, it is recommended to open the windows for a short time in order to remove the heated air from the passenger compartment. The air conditioning and recirculation air switches must be on;

- Normal cooling mode is used when traveling around the city and outside the city in moderately warm weather. The air conditioner switch must be on, the recirculation switch must be off;

- the maximum heating mode is used at very low ambient temperatures and to quickly warm up the air in the passenger compartment after a long stay. The air conditioner switch must be off, the recirculation switch must be on;

- the normal heating mode is used during the cold season to maintain the optimum temperature in the passenger compartment, after intensive heating in the maximum heating mode. The air conditioner and air recirculation switches must be off;

- the mode of blowing the windshield and glass of the front doors is set to quickly eliminate fogging of the glasses at high humidity. The air conditioner switch can be in any position, depending on the ambient temperature, and the recirculation switch must be turned off.

Note:

To prevent the glass from fogging up in rainy weather, turn on the blowing mode with the heater off, since the difference in the temperature values ​​of the glass surface and the supplied air can cause moisture condensation.

Helpful hints:

For more efficient ventilation and heating at a vehicle speed of less than 50 km / h and when driving through extremely dusty road sections with closed windows (to create excess air pressure in the cabin, preventing dust from sucking in), we recommend switching the heater fan to low or maximum speed with the switch. To quickly eliminate fogging of the rear window and release it from ice and snow, turn on the glass heating switch. If you do not use the air conditioner for a long time, then it is necessary to turn it on for a short time once a week with the engine running to restore the lubricant layer on the compressor parts and seals.

Source:  http://toyotauto.net/corolla/otoplenie-kondicionirovanie-i-ventilyaciya-salona.html