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SYMPTOMS PROBABLE CAUSE DIAGNOSIS CORRECTIVE ACTIONS Pressure extremely high on both low and high-pressure sides - Excessive refrigerant - Cooling performance - Condenser is dirty - Condenser fan motor is malfunctioning - Excessive refrigerant 1. Clean condenser 2. Check condenser fan motor operation 3. If 1 and 2 normal, check the (7) The A/C system does not function due to air in the refrigeration system. CAUTION: The low-pressure piping may be very hot and cause serious burns. HINT: These gauge indications occur when the refrigeration system opens and the refrigerant is charged without vacuum purging. SYMPTOMS PROBABLE CAUSE DIAGNOSIS CORRECTIVE ACTIONS - Pressure extremely high on both low and high-pressure sides - Low-pressure piping is too hot to touch Air in refrigeration system - Air in refrigeration system - Vacuum purging insufficient 1. Check if compressor oil is dirty or insufficient 2. Evacuate air and charge new refrigerant (8) The A/C system does not function effectively due to an expansion valve malfunction. AIR CONDITIONING: REFRIGERANT: ON-VEHICLE INSPECTION; ... |