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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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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,

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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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