Question about 1993 Chevrolet Suburban

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Front a/c is cold rear is not freon is fully

Front a/c is cold. rear is not. freon is fully charged rear controlls are working but olny blows warm air

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This is caused by a bad expansion valve in the rear on the evaporator. This or a bad dampener motor in the rear. You have to take apart the right rear inside molding and trim to get to everything. Be careful taking things apart try not to be rough with anything. You can also check the lines on the bottom of the car under the rear passenger side. You will see 2 aluminum lines, a large one and a small one, the large one should be very cold and the small one should be very hot. If either is the same as the outside temperature then you have a problem in the expansion valve or evaporator. I recommend replacing both of them at the same time.

Posted on Jul 11, 2009

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