Elements of the air conditioning system
- 1. Radiator cooling fan switch N2 (6 cylinder engine)
- 2. Relay box N1
- Clutch relay (marking MG CLT)
- heater relay (HTR marking)
- Second cooling fan relay (marking FAN NO.2)
- Third cooling fan relay (marking FAN NO.3)
- 3. Relay box N2
- Main engine relay (marking ENGINE MAIN)
- Relay for the first cooling fan (marking FAN NO.1)
- 4. Refrigerator
- 5. Cooling fan switch (4 cylinder engine)
- 6. Drive
- 7. Pressure sensor
- 8. Refrigerator fan
- 9. Compressor
- 10. Radiator cooling fan switch N1 (6 cylinder engine)
As part of maintenance, the following checks should be carried out regularly:
- check the condition of the compressor drive belt. If necessary, replace the belt;
- check belt tension and adjust if necessary;
- inspect the system hoses for cracks, swelling, and chafing. Replace hoses if necessary;
- inspect the fins of the refrigerator and clean out the dirt stuck in them;
- check refrigerant pressure.
Examination
1. Warm up the engine to operating temperature.
2. Set the temperature control knob to the cold air position. Turn on the maximum blower speed.
3. After the air conditioning system reaches operating temperature, feel the two tubes connected to the refrigerator.
4. The thinner tube should be cold, and the thicker tube should be even colder (approximately -16°C or -12°C).
If the thick pipe is much warmer than the thin pipe, the system must be additionally charged with refrigerant. Insert a thermometer into the center of the vent. The temperature of the air coming from the opening should be 3-5°C lower than the ambient air temperature. If this is not the case, the system must be additionally charged with refrigerant, for this, contact a specialist.
Refrigerant
Set for recharging R-134a systems
To recharge the air conditioning system with refrigerant, R-134a refrigerant is used. Any car enthusiast can recharge the air conditioning system on their own. To do this, you need to purchase a special recharging kit with instructions for using it.
1. Connect the hose to the valve located on the refrigerant pipe (indicated by an arrow).
2. Close pins 1 and 4 of the air conditioning pressure sensor with a jumper (arrow), to keep the compressor running while you charge the system with refrigerant.
Air conditioning odors
To remove odors that occur in the air conditioning system, special disinfectants are usually used. And, although it would be best to contact a specialized workshop, you can process the elements of the air conditioning system yourself.
Remove the blower resistor and disinfect the evaporator.