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How often should an AC compressor cycle on and off #4496599
08/24/17 02:45 AM
08/24/17 02:45 AM
Joined: Mar 2003
Posts: 3,511
Colorado
Chris B. Offline OP
Chris B.  Offline OP
Joined: Mar 2003
Posts: 3,511
Colorado
My 2012 Honda Accord V6 AC compressor was cycling on and off every 6 seconds which seemed like a lot but blew ice cold air. I had it in to the dealer for some maintenance and had them check it out. They said it was low on freon and recharged the system. Now it cycles exactly every 6 seconds and then every 14 seconds. Does this sound normal? The dealer service advisor couldn't tell me exactly how often it should cycle on and off. Also how often should the AC on a 1997 GMC Sierra with the Vortec 350 V8 cycle on and off? Thanks!

Re: How often should an AC compressor cycle on and off [Re: Chris B.] #4496610
08/24/17 04:19 AM
08/24/17 04:19 AM
Joined: Jul 2010
Posts: 18,709
PNW
ZeeOSix Offline
ZeeOSix  Offline
Joined: Jul 2010
Posts: 18,709
PNW
If the refrigerant is charged per spec and it's putting out good cold air, then I wouldn't worry about it.

Depending on the design of the AC system, and the cabin and anbient temperature as well as the AC setpoint temperature, all those variables will have an effect on the duty cycle of the compressor. So it could vary quite a bit, especially when it's trying to get to a steady state temperature of operation.

Re: How often should an AC compressor cycle on and off [Re: Chris B.] #4496648
08/24/17 06:02 AM
08/24/17 06:02 AM
Joined: May 2005
Posts: 10,279
ROCHESTER, NY
Char Baby Offline
Char Baby  Offline
Joined: May 2005
Posts: 10,279
ROCHESTER, NY
*Is this something that your Accord is doing now or has it done this before?
*Does your Accord have "Climate Control HVAC System", as compared to the more simple On/Off HVAC system?

I have noticed that with "Climate Control", the A/C does seem(IMO) to cycle On & Off more frequently than a basic system. However, I don't know if it's just me noticing this, or just the vehicles that I have owned that are doing this.

This doesn't seem out of line to me unless your car didn't do this prior.

Last edited by Char Baby; 08/24/17 06:04 AM.

"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic LX(17K)
Re: How often should an AC compressor cycle on and off [Re: Chris B.] #4496655
08/24/17 06:22 AM
08/24/17 06:22 AM
Joined: Feb 2014
Posts: 593
Margate England
Claud Offline
Claud  Offline
Joined: Feb 2014
Posts: 593
Margate England
Just a thought, Colorado is pretty high, maybe at lower elevations it would cycle in a different pattern?. I don't know, maybe thinner air means the condensor can't dissipate heat so well?.

Claud

Re: How often should an AC compressor cycle on and off [Re: Chris B.] #4496683
08/24/17 07:14 AM
08/24/17 07:14 AM
Joined: Jun 2003
Posts: 17,355
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,355
Deplorable in apple valley, ca
Depends on temps and fan speed


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: How often should an AC compressor cycle on and off [Re: Chris B.] #4496688
08/24/17 07:17 AM
08/24/17 07:17 AM
Joined: Feb 2014
Posts: 593
Margate England
Claud Offline
Claud  Offline
Joined: Feb 2014
Posts: 593
Margate England
Ok, given the same temps, fan speed will be a constant.

Claud.

Re: How often should an AC compressor cycle on and off [Re: Chris B.] #4496743
08/24/17 08:34 AM
08/24/17 08:34 AM
Joined: Nov 2009
Posts: 4,942
Houston, Texas
motor_oil_madman Offline
motor_oil_madman  Offline
Joined: Nov 2009
Posts: 4,942
Houston, Texas
Sounds normal. I know mine cycles on and off more frequently when in recirc mode. Like on 6 seconds off 6 seconds.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: How often should an AC compressor cycle on and off [Re: Chris B.] #4496781
08/24/17 08:55 AM
08/24/17 08:55 AM
Joined: May 2003
Posts: 7,326
Oklahoma
Schmoe Offline
Schmoe  Offline
Joined: May 2003
Posts: 7,326
Oklahoma
Depends on moisture in the air....that's how AC's work.


01 Supercrew Lariat 4X4
06 Accord EX-L V6
14 CRV EX-L (RIP) 2018 CRV EX-L
Re: How often should an AC compressor cycle on and off [Re: Schmoe] #4496866
08/24/17 10:36 AM
08/24/17 10:36 AM
Joined: Dec 2002
Posts: 42,085
New Jersey
JHZR2 Offline
JHZR2  Offline
Joined: Dec 2002
Posts: 42,085
New Jersey
Originally Posted By: Schmoe
Depends on moisture in the air....that's how AC's work.


I was going to say, isnt CO high and dry (lol)?

It sounds short to me, but if the conditions are right, it may be a couple control systems fighting each other.

This is a semi-mechanical system, not a dual zone digital control, right?

Re: How often should an AC compressor cycle on and off [Re: Chris B.] #4496950
08/24/17 12:46 PM
08/24/17 12:46 PM
Joined: Jan 2004
Posts: 4,155
California
nthach Offline
nthach  Offline
Joined: Jan 2004
Posts: 4,155
California
Depends on how much load is needed from the AC and the type of system. Some cars don't have clutched AC compressors and use a variable displacement system or a metering valve to adjust how much refrigerant is being compressed. On some cars - mostly the older Lexus LS400s and older GM cars(way before I was born) use EPR/POA valves and the compressor will always run as long as the AC is on.

I do notice automatic HVAC does cycle the compressor more, in most of those systems a photoelectric cell is feeding the HVAC control how much solar load is in the cabin(with the interior temp sensor).

Last edited by nthach; 08/24/17 12:50 PM.
Re: How often should an AC compressor cycle on and off [Re: Chris B.] #4497221
08/24/17 06:30 PM
08/24/17 06:30 PM
Joined: Mar 2003
Posts: 3,511
Colorado
Chris B. Offline OP
Chris B.  Offline OP
Joined: Mar 2003
Posts: 3,511
Colorado
Thanks gentlemen! Mine seems to behave the same way no matter how I have the system turned on. Recirc, Synced to both sides or any of the other settings. I honestly can't remember how it ran when new but I thought it cycles only a few times a minute but I'm probably wrong. Dealer just did a recharge saying it was low and they tested the system and checked for leaks but all was good to go they said so I'm happy!


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