Visually check the center of the compressor clutch to make sure it is spinning
with the pulley.
If not call for service, bring it to a qualified repair facility.
Is there any noise from a loose compressor drive belt, or compressor?
Listen for abnormal noises, if suspected; take it to a qualified repair facility.
Is there any compressor oil on hoses, fittings, or around the compressor?
If so, do not operate A/C system and take it to a qualified repair facility.
Is the engine coolant bypassing the heater valve?
Ensure that the heater valve is turned off. Feel the heater line into the heater coil
if the line is warm or hot, suggests that the heater valve is leaking.
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