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Discussion Starter #1
I have a 1994 w/the 3.5L engine and Auto temp control. If I turn on the Climate control, the compressor runs no matter what! I can have it on fully manual operation, set to 8o degrees and air at my feet, and the compressor cycles on. I know that the compressor comes on with a/c or defrost functions, but it is going on all the time. I hooked the car up to the computer,and it said that my car is calling for a/c clutch engagement, so I know the compressor is doing what it is asked to do. Why is my car calling for the compressor? Is this normal? If not, any ideas on what to replace? Please help me and let me know what your car does with the same settings (or any climate control setting for that matter). Thanks
 

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yeah, my car does that too.. AC clutch engages.. I disconncted the AC compressor last winter.. I didn't want to wear it out...
 

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anytime you have it on "defrost-Mode", the compressor runs the A/C system so that it can remove any extra humidity in the air so your windows don't fog up again.
 

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In a auto climate control the sytem will use both heat and A/c to maintain the set temp in the car and maintain huminity levels.

One never desconnect your A/C over the winter, the two reasons the compressor cycles with Defrost on is to 1) remove the Huminity and 2) to let the oil in the freon to lube the bearings in the compressor. If the compressor sits idle for a long peroid of time, the bearing will start to get noisy and you'll see your A/C belt in the rear view mirror.
 

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also, the oil circulates to keep the o-rings saturated. if they dry out, the Freon (R-134a atcually) will leak out by springtime
 

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Discussion Starter #6
I understand what you guys are saying about using the compressor for the defrost function. But what I was asking is if the compressor is on ALL the time (100% of the time) any time the climate control system is on? Mine is on even if I am on manual mode, heat on, and air blowing on my feet. Under those settings, I have never had a car that would kick on the compressor (I had about 12 different cars), that's why I thought it was weird that the compressor is on ALL of the time. Is that the way it is supposed to be?
 
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