Warning! 1. The air conditioning system line is under high pressure. Until the refrigerant is completely removed, it is prohibited to disconnect any hoses or remove the air conditioning system units. Refrigerant removal must be performed at a car service center.
2. The air conditioning system on models since 1995 is filled with R-134a refrigerant, which is incompatible with R-12 in terms of lubricating properties. Do not add R-134a to a compressor running on R-12 and vice versa, otherwise the compressor will fail.
3. Suburban models are equipped with an additional air conditioning system. The evaporator of the additional air conditioning is mounted in the rear of the vehicle.
1. Maintenance of the air conditioner consists of the following procedures.
a). Checking the condition and tension of the compressor drive belt, replacing the belt.
- b) Checking the condition of hoses and tubes (do not disconnect the main line!)
- c) Cleaning the inter-fin spaces of the condenser and the drainage tube.
- d) Checking the system charge with refrigerant.
2. The air conditioner should be turned on monthly for about 10 minutes.
3. The most common reason for poor air conditioning performance is insufficient refrigerant charge. If there is a noticeable increase in air temperature from the air conditioner, check the completeness of the refrigerant charge.
4. To check the refrigerant charge, warm up the engine.
5. Move the temperature control lever to the Cold position, the mode selection lever to the Norm position and the fan speed control lever to the Hi position. Open the doors and hood.
6. Check that the compressor is switched on, when the electromagnetic clutch clicks and the central part of the clutch begins to rotate.
7. Compare the temperature of the evaporator inlet pipe and the outlet pipe of the accumulator. If the temperature is slightly different to the touch, then refilling is necessary (see photo).
