The air conditioner has been switching on and off by itself, cool/hot,
cool/hot. With the car running I hear something under the hood switching on
and off. There is no pattern to the switching. A friend recommended that I
get the freon checked. I had an "A/C Service" performed and approx. 3lbs of
freon added. The switching on and off still occurs. What could be the
Hmm 3 lbs.. Thats a lot of freon.. You have a leak somewhere that
needs to be fixed, I'd start there. The thing that is "switching" is
a compressor clutch engaging and disengaging. The constant switching
is bad for the compressor and clutch. For all we know, the freon has
already leaked out, the system can't hold pressure, and the compressor
is constrantly cycling to try to compensate.
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