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Old 09-12-2010, 08:57 AM
Bigjack75 Bigjack75 is offline
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AC Compressor Replacement

Hello All,

My GF has an 03 Accord EX 2.4 and the ac stopped blowing cold air. I checked the refrigerant and it was fine. She had an oil change done at Firestone and had them check it out. The said the compressor was bad and said it would cost $975 to replace. I have worked on cars for many years and done just about everything except change out an ac compressor. I found the compressor, dryer and seals on line for $330 shipped. I am not sure how to evacuate the old refrigerant and make sure the system stays clean. Is there a procedure or guide online that someone could point me to? I have searched and can not find anything. Thanks.
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Old 09-12-2010, 11:17 AM
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The procedure will say to take it somewhere and have it properly evacuated with the a/c machine. You might/probably will be able to work out a deal that you get evacuated and charged back up (later) at the same price. Some places have a 30-day warrenty period on the charge and will recharge for no charge, etc. Last time I had a leak they evacuated the system, I fixed the part, and took it back for recharge. It won't be cheap but is a necessaty to properly charge and not damage the new compressor.
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Old 09-12-2010, 11:49 AM
Drew03Accord Drew03Accord is offline
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Before you do anything else, try replacing the AC relay which is in the fuse box under the hood. There are also two identical fan relays near it so you can swap it out with another just to test. I say this because mine stopped working earlier this summer and all I did was replace the relay to fix. Cost $6.00 at the auto parts store.

...Drew...
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Old 09-12-2010, 01:31 PM
Bigjack75 Bigjack75 is offline
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Fuses are all good. The compressor seems to come on when you turn on the ac. You can hear the familar drain on electrical. Also it blows hot air. Firestone did a check on the ac and said the compressor was bad.
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Old 09-12-2010, 05:08 PM
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CarlR33 CarlR33 is offline
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That is not the fan relay then. I had the same thing happen (relay) and nothing will happen when the a/c is switched on.
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Old 09-12-2010, 06:19 PM
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fireballer44 fireballer44 is offline
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That seems really odd...I wonder what tells them the compressor is bad? If it is turning properly and holding a coolant charge it doesn't seem like that's the problem. Typically a failed compressor will be either extremely noisy or not turn at all. In most cases they will leak as well. I'd run the car with the A/C on for 10mins or so and then check if the tube on the low pressure side of the system is cool/cold to the touch. If it is, then you may have another problem. It could be something a lot more simple. You say the air that comes out is hot (like heater hot?)...maybe the little electronic flap that goes from hot to cold is kaput.

A/C compressor on a Honda isn't terribly complicated to replace, but it is a bit of a PITA. If you want to work from the top you will probably have to remove the Alternator and maybe disconnect the power steering pump (you don't have to mess with the hydraulics, just move the pump out of the way). You can also try from the bottom but it may be hard to get it out. Personally, I just prefer working from under the hood rather than under the car. Big thing is to be sure everything is sealed up good, I recommend replacing any gaskets/o-rings you take off. Also, I would check for any leaks on the other A/C system fittings as if you find out later they are bad you have to evacuate it all over again. A lot of people recommend replacing the drier as well when you replace the compressor.

I do agree with the others, if you don't have the equipment, get the emptying/recharging done professionally. To recharge it you have to have a full A/C manifold set and a vacuum pump. You put it in vacuum to **** all the moisture out (and a good way to check for leaks). Then add the new coolant. It's not something you can do properly with one of those can's with the attachment from Autozone
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Old 09-17-2010, 02:39 PM
Bigjack75 Bigjack75 is offline
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Ok ac still not working. I had the compressor replaced and it did not fix the issue. He said he wasn't sure why it did not get cold but said there was something in the dash that was the only thing left to check/replace. I can't remember what it was called. Anybody got a clue what I am talking about? Thanks.
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Old 09-17-2010, 06:16 PM
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Quote:
Originally Posted by Bigjack75 View Post
He said he wasn't sure why it did not get cold but said there was something in the dash that was the only thing left to check/replace.
Who is he? Take it back to Firestone and tell them you replaced the compressor and it did not fix it. Maybe a discount on thiis work since they did a crappy diagnosis? Who did the recharge? Couldnt they diagnose it??
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Previous car: 98 Civic EX 5sp. with 155K, RIP
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Old 09-17-2010, 06:30 PM
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Fredsvt Fredsvt is offline
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Ok, first, did the old compressor grenade inside? Was the HVAC system scanned for codes? There can be issues with the system that could keep it from cooling that aren't compressor related.

These scroll compressors, when they die, tend to have catastrophic failure.

When the system was opened up, did anyone mention to you that it had "black death", metal contamination, etc.

Along with the compressor, as you found out, the drier must be replaced, which is part of the condenser, replacing the condenser is also a must as it will get clogged with the crap from the old compressor.

The expansion valve should also be changed, if it's restricted. It is NO fun to change.

I just did a CRV, known for exploding compressors. It got the condenser/drier, and I flushed all the lines and the expansion valve. I was lucky that the expansion valve was working, as I had flow through it with proper pressure drop when applying 150 psi of shop air through the valve and evaporator.

When assembling, the evaporator needs to have oil added to it, as well as the condenser prior to installing it. The new compressor should be filled with oil.

Oil amounts and balance are critical for proper cooling and compressor life.

If all is well, once it's charged with about 18oz of R134, (that's the CRV amount, the Accord should be close) the system run, and the pressures should be within tolerances based on outside temp and humidity.
The low side line should be ice cold and sweating, and the high side line to condenser burning hot, and the others moderately hot to the expansion valve.
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Old 09-18-2010, 02:09 PM
Drew03Accord Drew03Accord is offline
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Quote:
Originally Posted by Bigjack75 View Post
Fuses are all good. The compressor seems to come on when you turn on the ac. You can hear the familar drain on electrical. Also it blows hot air. Firestone did a check on the ac and said the compressor was bad.
Can't believe you didn't at least try to swap the relays. You had nothing to lose and it's a very common problem with the 7th gen. Firstly, a relay is not a fuse. It's a switch within a housing and you cannot visually inspect it. Secondly the car will still blow hot air as the AC relay controls only the compressor and not the blower motor. When mine went bad, I also swore the compressor was engaging but sometimes the drain from the blower etc fools you. You might have some very inept techs at firestone.
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Old 09-18-2010, 02:26 PM
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If you look down at the compressor, if the center part of the clutch is turning, the compressor is at least engaged through the clutch. The familiar click or clunk, depending on the car should be heard when it does engage.
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Old 09-18-2010, 03:30 PM
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Quote:
Originally Posted by Bigjack75 View Post
Hello All,

My GF has an 03 Accord EX 2.4 and the ac stopped blowing cold air. I checked the refrigerant and it was fine. She had an oil change done at Firestone and had them check it out. The said the compressor was bad and said it would cost $975 to replace. I have worked on cars for many years and done just about everything except change out an ac compressor. I found the compressor, dryer and seals on line for $330 shipped. I am not sure how to evacuate the old refrigerant and make sure the system stays clean. Is there a procedure or guide online that someone could point me to? I have searched and can not find anything. Thanks.
Get a new girlfriend... poof! problem solved!

go to car-part.com, search for a 2003-2007, 2.4L, ac compressor close to where you live, youd be amaze at the prices (<$80) and the condition of the used part... you only need one that still works...
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Old 09-21-2010, 07:19 AM
cobra94563 cobra94563 is offline
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I wouldn't use a used part with an unpredictable service life remaining..
I replaced the compressor with a (new) aftermarket model, only slightly more that a rebuilt. But once everything was replaced, it was still close to $300 to have it leak tested and recharged. I wouldn't want to risk paying that again if a used part failed again.
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