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Old 08-11-2008   #1
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Air Conditioning working intermittently

I'm having issue with my air conditioning not working all the time. In a nutshell: when it works it still blows cold as ice, the idle is fine, and there is no difference between stopped and freeway speeds. When it doesn't work it blows warm air, kicks the idle up to about 1500 rpm and cruising at freeway speeds doesn't help. I haven't determined what makes it stop or start working.

Any ideas on what could be causing this?

I'm going to speculate here and say its something up with the compressor clutch.
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Old 08-11-2008   #2
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Re: Air Conditioning working intermittently

Yeah, could be the compressor.

I brought mine to a shop for an A/C diagnosis because my A/C died. Turned out that the compressor was dead and needed to be replaced. Symptoms were exactly like yours, only mine didn't work 100% of the time.

They were gonna charge me $1500 CAD for the service. Luckily, I got my hands on a Haynes manual.

But, I would say get it checked out by a trained professional before doing anything. Like I said, it could be the compressor that's no longer working.
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Old 08-11-2008   #3
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Re: Air Conditioning working intermittently

yeah prolly the clutch going out. ive seen them kick on for a while, then stop and kick on and off every few seconds. listen to how yours is working with the hood open. if you hear it clicking on and off alot, its prolly clutch, or low on r134a
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Old 08-11-2008   #4
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Re: Air Conditioning working intermittently

Mine clicks on and off every 2-3 minutes. It always blows cold air right now. Should I be concerned about it clicking?
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Old 08-11-2008   #5
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Re: Air Conditioning working intermittently

I think that should be okay thrasher. Saving gas by not being on all the time.

Gearbox. If its low on refrigerant wouldn't it never be ice cold? I'll definitely check the clicking tomorrow.

I really hope its not the compressor but hopefully I can narrow **** down before I get to shell out the big bucks for a new one.

Thanks for the input guys.
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Old 08-11-2008   #6
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Re: Air Conditioning working intermittently

every 2-3 mins is normal. i was talking about every 5-10 seconds. and if its the compressor, get ready to shell out even more for the receiver/drier and the expansion valve/orifice tube and full flush of the system plus adding the right oil and refrigerent and amount. otherwise, the new compressor will be ruined too
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Old 05-25-2015   #7
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Re: Air Conditioning working intermittently

Hey,

I am having the same issue with my 2009 Civic. The air conditioning will work intermittently and more so when you first start a trip but as the trip goes on the A/C tends to just blow warm air. I have already tried changing the A/C clutch relay but the problem still exists. If anyone has any specific information on how what items to check it would be appreciated as I would prefer to tackle this on my own.

Thanks,

P
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Old 05-26-2015   #8
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Re: Air Conditioning working intermittently

You need to check if the fan is cooling the condenser unit.

On all A/Cs there is a hot and a cold side. If the hot side is not being cooled, the cold side will not work. The more the hot side gets cooled, the colder the cold side can get. It is a bit more complicated than that but go and run the car with the A/C and see if the fan on the A/C condenser unit turns on with the compressor. If it does not, you have found the problem.

In your situation, the A/C may be able to cool until the hot side gets too hot and is unable to cool properly.
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Old 06-03-2015   #9
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Re: Air Conditioning working intermittently

Hey,

thanks for the reply. I had a look and all fans are spinning when the A/C is working. I went out for a long drive the other day and eventually the A/C stopped blowing cold air. I pulled over and checked the fans and I was able to confirm that the top plate on the compressor (clutch?) was not spinning but all the other fans were. Its a funny thing as the first time you start the vehicle the A/C works great but over time it stops. I would like to do some circuit checking to see what the issue is but it is hard timing it right for when the compressor stops spinning. I have changed the A/C clutch relay thinking that would fix it but so far it is failing intermittently.

Based on how it is failing it seems like it might be a sensor or relay but I am not sure what to check. Any information is appreciated.

Thanks,

P.
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Old 06-04-2015   #10
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Re: Air Conditioning working intermittently

I am having a similar issue and I am suspecting a failing clutch on the A/C compressor. It will start out working ,fans engage, generating cold air and the clutch is running but after things get warm under the hood the clutch will stop engaging and I could see it slip. If I tapped the clutch carefully while running it would start up run for a few cycles and stop again.

The system is charged, high and low side pressures appear to be in the normal range.
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Old 06-04-2015   #11
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Re: Air Conditioning working intermittently

Well if the compressor is not running that is definitely the problem.

The question is why is it not running....

The field coil is basically a big magnet that pulls the clutch against the compressor. The clutch is the part where the belt is actually turning the unit, so when the clutch pushes against the compressor, the compressor turns.

May be a tad bit difficult, but when the problem happens, see if there is voltage being supplied to the field coil. If there is AND the compressor is NOT running you may have a bad coil.

ezone wrote up a short method to test the coil, see it here (need a voltmeter):

2007 LX A/C clutch won't engage

Click the image to open in full size.
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Old 06-04-2015   #12
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Re: Air Conditioning working intermittently

Quote:
Originally Posted by prux56 View Post
eventually the A/C stopped blowing cold air. I pulled over and checked the fans and I was able to confirm that the top plate on the compressor (clutch?) was not spinning but all the other fans were. I
Quote:
Originally Posted by Redneck_cdn View Post
I am having a similar issue and I am suspecting a failing clutch on the A/C compressor. It will start out working ,fans engage, generating cold air and the clutch is running but after things get warm under the hood the clutch will stop engaging and I could see it slip. If I tapped the clutch carefully while running it would start up run for a few cycles and stop again.

The system is charged, high and low side pressures appear to be in the normal range.

Sounds like both of you need to see if the electromagnetic coil is still ok (resistance check, and check that it's still getting power), then see how much clearance the clutch plate has.
If the clearance is too great, they will quit engaging when they heat up.
Spec is 0.35-0.65mm (.016"-.025").

Watch the clutch plate move in as it engages, see if it LOOKS like more than a half millimeter of movement.

Gap increases with wear, and by 200K they can have a lot of wear..
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Old 06-11-2015   #13
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Re: Air Conditioning working intermittently

I was having the same issue and the compressor started making noise. The pulley had alot of play and does not turn freely. I knew it was the bearing so I replaced the compressor pulley and clutch. I did not replace the stator since it's still good. I would have just replaced the bearing but I don't have access to a press and the pulley and clutch have deep grooves from wear. I replaced both without removing the compressor from the car saving time and money from having to have the ac evacuated/vacuumed and charged.
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Old 08-09-2015   #14
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Re: Air Conditioning working intermittently

Daughters 2008 had this same issue. Diagnosed it down to the clutch. I really did not want to replace the whole AC compressor as I did not feel like opening the high pressure freon system (it was blowing cold and pressures were fine while it did spin).

Ordered a replacement clutch off eBay and was surprised the quality of the unit was good. It took me about 4 hours to do the job. Removed the mounting bolts and wiring harness from the compresor but left all the hoses. This allows the compressor to rotate a bit to get to the front nut that holds on the outer clutch plate. I used a handheld battery powered impact driver and it removed this easily. The really difficult aspect of the repair is removing the circlip that holds the old magnet coil to the compressor. It's down in a groove and difficult to reach. The ONLY tool to get to this clip was the Channel Lock tool here:
Channellock 927 8-Inch Retaining Ring Plier - Snap Ring Pliers - Amazon.com Channellock 927 8-Inch Retaining Ring Plier - Snap Ring Pliers - Amazon.com

Even with this tool I had to extend the two prongs out about and extra 3/8" to reach the clip. Without a good cir-clip tool don't even start the job. Trust me as I broke three cheap ones I had in my tool box or purchased.

Once completed I ensured all wiring was secured as OEM had it. I put on the belt and started it up and it's been cooling great ever since. Remember this thing vibrates a lot at idle so if you skimp and do not secure the wiring correctly you will be doing this job over for a broken wire in a month or two.
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Old 06-19-2016   #15
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Re: Air Conditioning working intermittently

I have two 2008 model civics that have intermittent ac operation. I can probe the sensor on the a/c comp. with a test light and the a/c will work when it is in the don't want to work situation. One is a good friend and another is just a used car in the shop. Funny how trouble travels in pairs Well if anyone has had this problem I sure would like to hear the repair.
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Old 06-19-2016   #16
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Re: Air Conditioning working intermittently

If it cools well when the clutch does kick on then try to remove the clutch plate and remove the spacer washer. Some guys report that allows the worn clutch to last another 10-50K miles. Mine was a bad internal coil in the magnetic clutch. Replaced and works well. If you can kick the clutch in by tapping it with a small hammer then the coil is OK and the spacing is just worn. Be careful with the hammer tap as it's tight in there and the last thing you want is to be injured or damage the car.

.pS Recommend to replace the relay for the AC clutch at the same time. The clutch often goes bad after having that relay arc and pulse over and over. The collapsing magnetic field will eventually break down the insulin in the coil and make it go out.
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Old 4 Weeks Ago   #17
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Re: Air Conditioning working intermittently

NewJersey2008Civic about a minute ago 2008 Civic A/c
For all of those with 2008 Civic air conditioning problems you need to call Honda Corporation to Complain. COMPLAIN COMPLAIN COMPLAIN 800) 999-1009 toll free Monday-Friday: 6am-5pm PT I called and there was a recall but only on the cars manufactured in a specific location. Unfortunately wherever my car was manufactured and I'm in New Jersey there was not a recall I was told by Honda that if they receive enough calls from cars that were manufactured in the same location that they would then put out a recall so for all of us in the Northeast please call and complain because personally with all the complaints that I'm seeing online this is a serious problem and we should not have to pay for it by the way today in the mail I received a recall notice for my 2008 Civic regarding the airbags when the airbags go off there are metal fragments that could pass through the air bag cushion material causing injury to the vehicle occupants it also stated that your passengers should sit in the backseat and not in the passenger front seat so please check and make sure your vehicle is not part of this recall
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Old 4 Weeks Ago   #18
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Re: Air Conditioning working intermittently

^Multi-forum post^

https://www.cargurus.com/Cars/Discussion-t32429_ds738133



At what point does anyone think a car owner should actually own their car and be responsible for maintaining/fixing it?
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