Other Conditions Normal

Condition
1. Air bubbles in sight glass.
2. Center vent temperature too high.
3. High pressure reading too low.
4. Low pressure reading too low.

Cause
Low refrigerant charge in system caused by a slight leak.

Correction
1. Perform leak test.
2. Repair leaks as necessary.
3. Evacuate & recharge A/C system.

Condition
1. Low pressure reading too high.
2. High pressure reading too low.
3. No air bubbles in sight glass.
4. Center vent temperature too high.

Cause
Internal leaks in compressor due to faulty valves.

Correction
1. Replace compressor.
2. Evacuate and refill A/C system.
3. Perform operational test.

Condition
1. Low pressure reading too high.
2. High pressure reading normal to high.
3. Center vent temperature too high.
4. Compressor vibrating.
5. Low pressure line icing.

Cause
Flooded evaporator caused by stuck expansion valve.

Correction
1. Replace expansion valve.
2. Evacuate and charge refrigerant system.