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A/C Cycling On/Off every second

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Old Sep 29, 2011 | 07:58 PM
  #1  
2nd Try's Avatar
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A/C Cycling On/Off every second

No matter what position I put the HVAC control to have the A/C on the condenser itself is cycling on/off constantly, about once every second. I know this isn't normal. This is a 92Z w/ 17k original miles I picked up last month. My previous 91Z would just stay on, like all cars. Previous owner knew nothing about the car...

Any ideas where to start? Just needs a new compressor or is this simply an electrical issue and/or sensor???
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Old Sep 29, 2011 | 08:34 PM
  #2  
travis401's Avatar
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From: Arlington, Tx
Car: 91 Camaro RS
Engine: empty bay (for now)
Transmission: Built T-56
Axle/Gears: 3.42 stock posi disc
Re: A/C Cycling On/Off every second

ac clutch cycling is an indicator of low freon
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Old Sep 30, 2011 | 12:35 AM
  #3  
blackbeauty89's Avatar
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From: Owatonna, MN
Car: 1989 Pontiac GTA/2007 TrailblazerSS
Engine: 350 L98/LS2
Transmission: 700-R4/4L70E
Axle/Gears: 3.27/4.10
Re: A/C Cycling On/Off every second

get the a/c recharged. but make sure to check for leaks first with leak detector.
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Old Sep 30, 2011 | 07:38 AM
  #4  
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Re: A/C Cycling On/Off every second

Now that's the answer I was looking for! This is what I was hoping, but didn't want to do this until I had some expert advice. Will check for leaks first, then charge if all is OK.
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Old Jun 7, 2012 | 10:08 AM
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evilemokid94's Avatar
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From: Elwood, IN
Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: A/C Cycling On/Off every second

How often should the compressor cycle? I just got mine going and it seems like my clutch stays engaged for a long time. It kicks off when I turn the ac off, and the clutch disengages while I give it gas then kicks back on. Is this normal?
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Old Jun 7, 2012 | 07:31 PM
  #6  
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: A/C Cycling On/Off every second

Minimum on time should be around 7 seconds. Any less than that and it's usually an indication of low freon.

Staying on for a long time is normal as long as the system is working properly. All depends on the pressures and if the evaporator freezes up or not.
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