General description
The heater is controlled by four adjustments, which allow achieving a comfortable air temperature in the car.
The fresh air supply control lever allows you to set one of two modes of operation of the heater - the mode of suction of outside air and the mode of air recirculation. The recirculation mode involves the use of a heater fan and is usually turned on in very dusty areas or in order to quickly warm up the car interior. Switching on the fresh air supply mode allows you to quickly ventilate the interior or remove condensation from the windows.
The flow direction switch lever allows you to direct heated air to the floor of the passenger compartment, to the windshield or instrument panel nozzles. The lever has two fixed positions, by selecting which it is possible to control the temperature of the air leaving the nozzles located on the floor in relation to the temperature of the flow supplied through the nozzles of the instrument panel.
The temperature control lever allows you to change the position of the flaps that direct air either through the heater heat exchanger (in HOT mode (Hot)), or bypassing it (in COLD mode (Cold)). The maximum intensity of the heater operation is achieved only when the engine is warmed up to normal operating temperature.
The fan control lever allows you to turn the fan on / off and select the desired speed of its rotation.
On models equipped with air conditioning, a similar control panel is used with an additional on / off button for the air conditioner. The button is equipped with a control lamp, which turns on simultaneously with turning on the air conditioner.
The air conditioner can only be used when the engine is running, as the compressor is driven by the engine via a belt drive.
Turning on the air conditioner with the heater control lever set to the HOT position ensures the supply of dehydrated air to the passenger compartment, which, in particular, allows you to quickly remove condensate from the windows of the car.
The maximum intensity of cooling of the air supplied to the passenger compartment is achieved by moving the temperature control lever to the minimum position (COLD). In order to avoid freezing of the evaporator in this mode, it is necessary to turn on the heater fan at maximum speed.
In the cold season, the air conditioner should be run for a short time (about ten minutes) at least once a month. Such regular inclusions will prevent the seals from drying out and, as a result, the failure of the air conditioning system.
Removal and installation of the block of a heater
Removing
1. Remove the instrument panel. The location of the components of the heating and air conditioning systems in the passenger compartment with the instrument panel removed is shown in the accompanying illustration.
2. Empty the cooling system by draining the coolant from it into a clean container.
3. Working in an impellent compartment, disconnect hoses from heater tubes.
4. Give bolts of fastening of assembly of the control panel to a heater. Disconnect the panel bracket, then remove the control panel from the heater unit
5. Disconnect the control drive cables from the heater unit. Try to remember their installation position
6. Give fixing bolts and remove a ventilating air duct from the passenger party of the car.
7. Give fixing bolts and remove and remove the central ventilating air duct.
8. After releasing the bolts, partially remove the ventilation duct from the heater block, passing from the driver's side of the car.
9. Release the wiring harness from the clips at the front of the heater block.
10. Give bolts of fastening of a heater.
11. Remove the heater from under the bulkhead of the engine compartment. Take care not to damage the heater pipes and water tap.
12. To remove the assembly of the heat exchanger with a faucet, release the screws of the mounting clamp and release the clamps securing the tubes to the heater unit. Disconnect the water faucet rod, remembering its position. Move the heat exchanger to the side, separating it from the heater block.
Installation
Installation is in the reverse order.
1. Before installing the heater unit on the car, adjust the drive rod of the water tap (the accompanying illustration shows the rear view of the heater. Data on adjusting the faucet are given on the insert):
- Disconnect the control rod from the air lever;
- Pull back the control rod so that the gap between the control lever and the drive lever is 2 mm;
1 - control rod; 2 - thrust; 3 - heater assembly; 4 - air temperature control lever; 5 - tubes; 6 - mounting clamp; 7 - heater heat exchanger
- Turn the air control lever fully clockwise and connect the control rod to the lever;
- Make sure that the heater tap is working properly by blowing into the heater tubes.
Note. Access to the faucet is impossible without first removing the heater from the car.
2. Try not to damage the heater tubes when putting the block into place.
3. Check up correctness of installation in a bulkhead of an impellent compartment of the plug-in bushing of tubes of a heater.
4. Before reinstalling the instrument panel, check the correct functioning of the heater control. Adjust the drive if necessary.
5. With the engine running, turn on the heater, make sure it functions properly and check for leaks.
Removal and installation of the heater control panel
Removing
1. Disconnect the negative cable from the battery.
2. Remove the central part of the instrument panel. A view of the heater control panel with the central part of the instrument panel removed is shown in the accompanying illustration.
3. Remove the handles from the control levers by pulling them off the stems. Remove the heater control panel trim.
4. Loosen the fixing screws and remove the heater control panel assembly so that it is possible to disconnect the electrical connectors in its rear part.
5. Give fixing screws and remove from the car a ware box.
6. Loosen the temperature control cable clamp on the heater block and disconnect the cable from the actuating lever.
Note. If the heater control worked properly before removal, mark the position of the sheath of each of the cables in relation to the heater block with quick-drying paint or other suitable method. During assembly, the cables must be connected to their original positions.
7. Release the air control cable clips at the bottom of the instrument panel and on the air intake assembly. Disconnect the cable from your actuating arm.
8. Working on the right under the instrument panel, release the airflow control cable lock and disconnect the cable from the actuating lever.
9. Give the fixing screws and remove the heater control assembly from the heater unit.
Installation
Installation is in the reverse order.
If the marking was not made during the dismantling, adjust the heater control drive cables.
Heater control drive adjustment
Air control rods and cable
1. Disconnect the airflow control cable from the actuating lever.
2. Release from fastening clips levers of the top and lower shutters and the lever of the shutter of an obduv glass. The drive components are shown in the accompanying illustration, which is a view of the heater block on the right.
3. Push the side rod counterclockwise as far as it will go.
4. Turn the upper and lower damper levers fully clockwise and install the lower and then the upper rods first.
5. Push the side rod all the way clockwise. Turn the windshield damper lever counterclockwise to the stop and install the blower damper rod.
6. Pushing the side link fully clockwise, set the airflow control lever to the front vent position, then connect the airflow control cable to the side link.
7. With the heater fan running at maximum speed, move the air flow control lever through all positions, making sure that it functions properly.
Stem and temperature control cable
Note. If the control rod needs to be adjusted, the heater must be removed from the vehicle.
1. Give fixing screws and remove from the car a ware box.
2. Set the temperature control lever to the maximum heat position.
3. Push the temperature control lever fully clockwise while slightly pulling on the control cable sheath to take up any slack, and secure the cable into the retainer clip.
4. Warm up the engine to normal operating temperature and check the temperature control lever for proper operation.
5. Reinstall the storage box.
Air control cable
1. Give fixing screws and remove from the car a ware box.
2. Working in the footwell on the passenger side of the vehicle, release the air control cable from the retainer on the air intake unit.
3. Set the air control lever to the recirculation mode position.
4. Push the feed control lever all the way forward on the vehicle and secure the control cable to the retainer clip.
5. Check the air control for proper operation.
6. Reinstall the storage box.