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AC not working... what to do?

 
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Old 06-17-2009, 10:54 PM
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AC not working... what to do?

edit: before reading this know that most 4th gen climate control issues are solved by following this thread; read all the way through because unless it has been edited, one step in the original instructions (snapping off the buttons) is not necessary and the clips do tend to break...

Here's the thread on fixing the problem: INT: 4th gen -Remove Climate Control and Take It Apart

I took my car in for an oil change today and asked them to recharge the AC... I got an h22a swap about a year ago and the motorsports shop said the AC would probably just need to be charged... Unfortunately, the compressor would not kick on and stay on... after they added freeze12, they pressed the AC button and it would sometimes come on green briefly and then go off... (it's holding pressure)

I know 4th gens have a problem with the climate control... I have been reading about the switches and I know that my switches (between different "air selections"... floor, dash, defrost...) don't always work... the head mechanic and owner thinks that is the most likely culprit... I know there are directions on the site for doing this, but I am not sure I am capable... I will check majestic honda for the part, but what do I need to buy???? and where else might I get it?????

Another mechanic there said that he thinks it is the compressor... he said the rotor "spun like a top, and shouldn't do that" when he tried it with his finger...

So, what do you guys think? and who wants to solder those connections for me?








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Last edited by mr_y82; 09-01-2010 at 10:51 PM.
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Old 06-17-2009, 11:13 PM
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Re: AC not working... what to do?

fixing the climate control is actually very easy man, i did mine in like a half hour following hojemwoods DIY, its very straight forward and detailed. just do that first then if that doesnt work check the compressor.
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Old 06-18-2009, 12:32 AM
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Re: AC not working... what to do?

its most likely your climate control... if you hit the dash above it does it fix it ever...if so then that is your problem...

did they add freeze12 or r134....just curious
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Old 06-18-2009, 11:24 PM
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Re: AC not working... what to do?

I'm also having A/C problems.

I've had A/C problems since I've owned my '92 and have just dealt with it. But I'd love to figure out a fix. Here are my symptoms: Climate control temp slider doesn't do anything. Actually blows a bit colder when about an inch to the right of coldest. AC light lights green and stays green when on. I can feel the engine react when I hit the AC button and hear the compressor turn on/off. If I switch between normal output to another mode (defrost, bi-level, etc) the middle vents won't open back up for anywhere from 20 min up to several weeks. Condenser fan doesn't seem to work. Fusses/breakers seem ok. Hard to tell with breakers though. Bought cheap replacement fan--same response. Currently the condenser fan is in the trunk. Also no heat or defrost. It blows but not hot or even lukewarm.

I do have the issue of the climate control lights not going on when I turn on the headlights which is fixed by giving the dash above it a gentle thump.

Any suggestions on where to look first. I don't have a ton of extra cash to throw at my mechanic to try and find a fix. The condensor seems to be working ok. My guess is it lies somewhere with the climate control.
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Old 06-19-2009, 01:39 AM
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Re: AC not working... what to do?

first of all i know about jack about ACs. when summer started up my AC was cooling a little but not enough, so i bought one of those tools to check the pressure. it was sitting at 75psi and the tool said it was supposed to be about 35psi so i, /gasp, let it out until it was back in the green. now i have no cool air coming out. think it would be safe to add coolant back to see it it works again? the guy at auto zone said not to overfill em cause one of the hoses could blow off and hit me or break something under the hood.

p.s. yes i checked the low pressure port and yes it uses R134a other wise the gauge i have wouldn't fit

not trying to jack thread just figured i would piggy back and not post another ac question
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Old 06-19-2009, 07:01 PM
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Re: AC not working... what to do?

I have a '92 si how do I tell if its running R134?
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Old 06-20-2009, 01:27 AM
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Re: AC not working... what to do?

dID SOME ONE say SOLDERING??????

http://www.preludezone.com/showthread.php?t=20198


The Chilton's manual, that is free on this site, stickied at the top of our forum, has a HUGE troubleshooting scenario and break down of the AC System Components. You Might Just wanna sit down and spend a lil time reading it through, then go get yourself a DMM and other misc tools and get to work.
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Old 06-21-2009, 01:32 PM
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Re: AC not working... what to do?

thanks everyone... I guess I might have to tackle it this summer...

my system uses freeze 12, right? that is what they added... chassis is 92, but the engine was manufactured in sept. 1994...
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Old 06-22-2009, 04:20 PM
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Re: AC not working... what to do?

got loose contacts also. forum requires me to make one post before I can view hojemwoods's post. so, here it is :)
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Old 07-06-2009, 06:21 PM
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Re: AC not working... what to do?

Quote:
Originally Posted by 94_lude_vtec View Post
fixing the climate control is actually very easy man, i did mine in like a half hour following hojemwoods DIY, its very straight forward and detailed. just do that first then if that doesnt work check the compressor.
Can u provide me with the link pretty plz....
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Old 07-07-2009, 11:35 AM
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Re: AC not working... what to do?

^

INT: 4th gen -Remove Climate Control and Take It Apart
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Old 07-09-2009, 02:41 PM
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Re: AC not working... what to do?

im bout to try this too, hope it works for all of us!
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Old 07-11-2009, 05:34 PM
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Re: AC not working... what to do?

I don't usually post worthless posts on a forum but I needed one to view the guide.
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Old 07-12-2009, 06:45 AM
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Re: AC not working... what to do?

Are you hearing squealing when you turn the car on?
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Old 07-12-2009, 11:34 AM
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Re: AC not working... what to do?

I hear a "hum" sometimes until the ABS light comes on...
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Old 07-19-2009, 12:45 AM
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Re: AC not working... what to do?

I'm prolly gonna have to attempt that thread you linked, thanks - THIS HEAT IS KILLING ME!
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Old 07-21-2009, 01:02 PM
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Re: AC not working... what to do?

one post here to read
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Old 07-22-2009, 05:57 PM
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Re: AC not working... what to do?

I just did my climate control a few days ago. Success FTW! I have NEVER soldered a circuit board or anything that small EVER and I have really shaky hands but it worked and it's good to go. You can do it! The points are fairly small so make sure you have a really fine tip on the solder gun.
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Old 07-24-2009, 06:49 AM
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Re: AC not working... what to do?

thank you for the help
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Old 07-26-2009, 09:07 PM
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Re: AC not working... what to do?

I just tried the soldering technique and it fixed my issue also (based on the fact that I had to punch my dash to get it to stay on). Thanks guys for the wonderful write-ups about the issue (especially hojemwoods)
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Old 07-28-2009, 04:32 PM
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Re: AC not working... what to do?

Could I have a link to hojemwoods DIY? I have to bang above the dash to get certain things to work.
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Old 07-28-2009, 04:34 PM
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Re: AC not working... what to do?

Nevermind. Found it.
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Old 08-19-2009, 09:11 AM
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Re: AC not working... what to do?

I tried to recharge my A/C last night and it won't take any gas from the low side. The gauge reads quite high. When i released the hose from the low side, the gas can emptied in thin air. When i checked the valve, it seems to have pressure. Could the line be clogged?
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Old 08-19-2009, 09:38 AM
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Re: AC not working... what to do?

ohh could that be why my air doesn't always get cold, cuz the climate control is like broken..
It was getting really cold before then my dad added some freon or to charge it and now its not getting cold.
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Old 08-19-2009, 09:50 AM
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Re: AC not working... what to do?

Before you recharge, make sure you empty out the old gas first. Don't mix them. You could be running 2 different gases in there.
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Old 08-19-2009, 10:33 AM
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Re: AC not working... what to do?

Quote:
Originally Posted by prime81 View Post
Before you recharge, make sure you empty out the old gas first. Don't mix them. You could be running 2 different gases in there.
ohh good point! i didn't do that
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Old 09-05-2009, 10:12 PM
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Re: AC not working... what to do?

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Originally Posted by bCoy View Post
ohh good point! i didn't do that
Same, i was having the same issues, finally emptied everything and used one type, blowing ice cold BABY!
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Old 09-18-2009, 07:48 AM
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Re: AC not working... what to do?

I did the resolder but it didn't fix the a/c issue although now a/c button is on consistantly when pressed on do I need to re re solder ?

Last edited by preludetool; 09-20-2009 at 03:01 PM.
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Old 05-04-2010, 08:17 PM
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Re: AC not working... what to do?

I have a 92 prelude si 2.3 and i got the a/c working and it only blows cold when i am driving. the problem is that the two fans do not kick on with my a/c comp. i have checked the relays and both seem to be fine..all fuses are fine. they do come on after i turn the car off (if it is to hot...) i have tested both fans and they do work...so i dont know why they don't kick on when i got my a/c on.....the compressor works like a charm. i just filled it with r134a as called for. i have changed both relays and got the same actions...can some one tell me what i should focus on next????

please and thank you very much.....

oh i almost forgot....every now and then it lets out a big cloud of white smoke from the compressor area. but by the time i get under the hood it's gone and i dont know where it's coming from...
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Old 05-06-2010, 07:41 PM
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Re: AC not working... what to do?

Quote:
Originally Posted by alex86 View Post
got loose contacts also. forum requires me to make one post before I can view hojemwoods's post. so, here it is :)
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