Question about 1998 Cadillac DeVille

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Air and heater blower

The blower started working off and on now it does'nt work at all
the air compresser still works

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If you are losing refrigerant (that vehicle uses 134a) there is a leak somewhere. If you are not losing refrigerant, there are several things that you can check.

You say you replaced the refrigerant twice and recharged it twice. Was the system evacuated and recharged, or did you just use a DIY kit.? With 134a too much is a bad as not enough, an overcharged system will not cool!

A bad expansion valve will allow system pressure to build, and will make the compressor work harder, which would account for your feeling that the A/C is taking power from the engine.

A bad radiator cooling fan will do the same thing. Does the radiator fan come on when you turn on the a/c?

The heater control valve could be bad, or the air mix door not working properly, allowing the heater to be actually heating the air conditioned air. If the a/c actually gets warmer than the outside air, then this is what I would look for first! It may be as simple as a vacuum leak in a control line!

Posted on Jul 02, 2008

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