Check the condition of the compressor drive belt. Replace belt if necessary.
Check belt tension and adjust if necessary.
Inspect system hoses for cracks, bulges, and chafing. Replace hoses if necessary.
Inspect the refrigerator fins and clean out any 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).
5. 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 20–25°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 the air conditioning system with refrigerant
Recharging air conditioning systems of later models that use R-134a refrigerant can be carried out by any motorist on their own. To do this, you need to purchase a special kit for recharging.
To recharge the air conditioning system with refrigerant, two types of refrigerant R-12 and R-134a are used. Systems charged with R-12 refrigerant are used primarily on early models (1993). Maintenance of these systems must be carried out in specialized workshops.
1. Connect the hose to the valve located on the refrigerant pipe or water separator.
2. close contacts (indicated by an arrow) pressure switch with a jumper to keep the compressor running while you charge the system with refrigerant.
Heating system
Examination
1. Measure the temperature of the air coming from the vent.
2. Inspect the hose of the heater and evaporator unit, check that it is not clogged.
If the air coming from the vents is not hot, the problem may be:
- A) Thermostat stuck open. Replace thermostat.
- b) Clogged heater radiator hose. Flush the radiator hoses and the radiator itself.
- V) Clogged heater core. If the radiator fails to flush, replace it.
If the blower does not operate in all modes, see subsection 4.9.
If air is not coming from the vents:
- A) Turn on the ignition and blower. Listen to see if the fan motor is running.
- b) If the motor does not work, replace it.
If steam or an antifreeze smell comes out of the vents, the heater core is leaking and needs to be replaced.
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.