Evaporator Core: Testing and Inspection

COMPONENTS

ON-VEHICLE INSPECTION
1. Check quantity of refrigerant gas during refrigeration cycle.
2. Install manifold gauge set.
3. Run the engine at 2,000 rpm at least 5 minutes.
4. Read the manifold gauge and check the gas leakage from the evaporator by using gas leak detector.
- If the expansion valve is clogged low pressure reading will drop to 0 kg/Sq.cm, otherwise it is OK.
- If the expansion valve is clogged or gas leak from the evaporator, then repair or replace as necessary.

OFF-VEHICLE INSPECTION




1. Check for damaged fins of the evaporator core.
2. Check for clogged fins of the evaporator core. If fins are clogged, clean them with compressed air.

CAUTION: Never use water to clean the evaporator core.

3. Check fittings for cracks or scratches.