System Check - Refrigeration

If a malfunction in the refrigerant system is suspected, check the following items:

1. Check the outer surfaces of the radiator and condenser cores to be sure that the airflow is not blocked by dirt, leaves or other foreign material. Be sure to also check the area between the condenser and the radiator.
2. Check for restrictions or kinks in the condenser core, hoses, tubes, and fins.
3. Check for proper blower motor operation.
4. Check the entire system for refrigerant leaks.
5. Check all air distribution ducts for leaks or restrictions. A low airflow rate may also be caused by a blocked evaporator core.
6. Check the compressor clutch for slippage.
7. Check that the compressor drive belt is properly tensioned.
8. Check the expansion valve for blockage.
9. Check the sight glass in the receiver/dryer for bubbles (which would indicate a low refrigerant charge or moisture in the refrigerant).