Over time, a car's air conditioning system will begin be less and less effective, until the day when you turn the knob and all it spits at you as you roast in the summer heat are tepid, warm gusts.

How does a tech know the a/c compressor he or she is diagnosing is actually failed and that the problem is not a crankcase heater, condenser fan, or rubbed out wire? According to the contractors The ...