A/c kicking on with heater
05-22-2006, 03:52 PM
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Car: 00 Camaro SS
Engine: 5.7
Transmission: 6 speed
A/c kicking on with heater
I've noticed that when I turn on my heater and I'm at an idle my a/c compressor comes on and goes off every few seconds.It makes my idle fluctuate a couple hundered rpm when it does it and it's annoying.Anybody have this happen?
05-22-2006, 04:34 PM
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Car: 00 Camaro SS
Engine: 5.7
Transmission: 6 speed
Mine blows cold when I have the controls on cold but if I want the heater on then the compressor just comes on and goes off in about 5 sec cycles.
05-22-2006, 06:54 PM
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Car: '85 TA
Engine: Aluminum Fuelie
Transmission: Mother of All Manuals
Originally Posted by 87tpi
Mine blows cold when I have the controls on cold but if I want the heater on then the compressor just comes on and goes off in about 5 sec cycles.
Originally Posted by 92purplehaze
also someone mounted the switch to the electric fan to the a/c so when i have it on the a/c goes on wasting my gas.. I'm thinking they messed up the wiring??
05-22-2006, 07:00 PM
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Car: 00 Camaro SS
Engine: 5.7
Transmission: 6 speed
Yep,I can have the controls on defrost/hot and it blows hot but the compressor still kicks on.If I have the a/c on it stays on.
05-22-2006, 07:34 PM
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Car: 1982 Trans Am & 1982 Corvette
Engine: L-98 with LO-3 induction. 350 CFI
Transmission: 5 speed and vette has 700r4
Axle/Gears: 373's in T/A .. vette unknown
all cars do that
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None of my other cars do.
05-22-2006, 08:10 PM
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Car: '85 TA
Engine: Aluminum Fuelie
Transmission: Mother of All Manuals
I agree, mine don't either. You might want to check your HVAC controls, as some wires might have been worn down and things might be crossing over. That's all I can think of at the moment...
05-22-2006, 08:35 PM
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Car: '92 firebird
Engine: 305 HO
Transmission: 700R4 TCI performance
Axle/Gears: 10 bolt disc brake 3:42 slp auburn
like Jproz1167 said ALLcars do it. If you have your defrost on your a/c compressor will kick on and than turn back off. Every single vehicle out there does it if you notice or not, even all the new cars. Most people dont realize it or able to tell depending on the cars it is easier to hear the a/c compressor kick on.
05-22-2006, 10:50 PM
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Car: '85 TA
Engine: Aluminum Fuelie
Transmission: Mother of All Manuals
fbird92... 87tpi has the problem, not me. His A/C comes on with the vent and heater settings. I would suggest finding another HVAC control unit from the junkyard and see if that solves your problem. I'm looking at the wiring diagram and nothing looks like it would cause that to happen, so maybe your control panel went south.
Last edited by super_kev; 05-22-2006 at 10:56 PM.
05-22-2006, 11:45 PM
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Car: 1983 Camaro Z/28
Engine: LU5 305 CFI
Transmission: 700R4
Axle/Gears: J65/G80/G92-3.23
I agree with Super_kev you may have a bad HVAC head unit.But as others have stated the compressor does come on when you select defrost.This is done to control humidty.The compressor short cycling,cutting in and out very often,could be a sign the system is low on refrigerant.
05-23-2006, 05:54 AM
#16
Originally Posted by super_kev
Can you explain that please? Are you saying that someone wired in a switch so that when you turn on your blower motor, it turns on the A/C?
05-23-2006, 03:17 PM
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Car: '85 TA
Engine: Aluminum Fuelie
Transmission: Mother of All Manuals
Originally Posted by 92purplehaze
What I mean is the car has a manually controlled electric fan wired to the A/C, so when it starts running hot you have to put the A/C on, which is pretty much a waste of gas/power
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