When cooling is insufficient

Condition: Air conditioning system does not function effectively.

Symptoms

Probable Cause

Diagnosis

Corrective Actions

• Pressure low on both low and high pressure sides

• Cooling performance insufficient

Gas leakage from refrigeration system

• Insufficient refrigerant

• Refrigerant leakage

1. Check for gas leakage using gas leak detector, and repair if necessary

2. Supply appropriate volume of new refrigerant

3. If indicated pressure value close to 0 when connected to gauge, create vacuum after inspecting and repairing location of leakage

(4) When the circulation of the refrigerant is poor:

Condition: Air conditioning system does not function effectively.

Symptoms

Probable Cause

Diagnosis

Corrective Action

• Pressure low on both low and high pressure sides

• Frost exists on piping from condenser to A/C unit

Refrigerant flow obstructed by dirt in condenser

Condenser clogged

Replace condenser

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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