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31– 16 31 A/C insufficient cooling Leak in system Refrigerant (insufficient) Refrigerant (overcharged) Air in refrigerant Moisture in refrigerant - Condenser (dirty or blocked) Expansion valve (dirty or blocked) Evaporator core (dirty or blocked) A/C high/low pressure line (dirty or Blower speed switch (damaged) Blower motor (damaged) Compressor assembly belt (loose) Too much noise in system Compressor assembly belt (slip) Compressor assembly clutch bearing - Compressor assembly solenoid coil (faulty - Compressor assembly belt (over tightened) Compressor assembly mounting bolt Cooling fan blade (distorted) - Refrigerant oil (too low) Pressure on low pressure side switches Moisture in refrigerant (excessive) - Pressure is low on both low and high A/C system (leaked) Refrigerant (insufficient) Pressure is low on both low and high Condenser (dirty or blocked) Vacuum occurs on low pressure side, and Moisture in refrigerant (excessive) - Expansion valve (dirty or blocked) A/C line (leaked) Condenser (dirty or blocked) Pressure is too high on both low and high Expansion valve (faulty) - Refrigerant oil (excessive) Symptom Suspected Area See page |