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A/c not engaging when its hot?

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Old 06-09-2009, 12:22 PM
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Default A/c not engaging when its hot?

A 95 ex with a GSR swap. I bought the car, everything on it was OEM, nothing had been replaced except for a CD player. Purchased the car and let it sit until that same weekend and did the swap. A/C worked fine with the d series on that short trip home , did the swap, never disconnected the lines and when the GSR when in so did the a/c. Drove the car around for a week and noticed that the A/C wasn't engaging. I figured "hum, it must need a recharge" so I did. After the recharge from Goodyear, It worked fine. And then, it happen again? I starting noticing when the weather was hot the a/c would not engage but when it was cooler through the day it would come on with out a problem? What could it be? I've looked around on line and even took it back to Goodyear and they couldn't figure it out because of course when they tested it, it came on? Thanks for your help
Old 06-09-2009, 12:35 PM
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Default Re: A/c not engaging when its hot?

check to see if you have airflow.. the ac fan should kick on right away when you hit the little a/c button
Old 06-09-2009, 01:33 PM
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Default Re: A/c not engaging when its hot?

You might want to do a search. I have read that similar heat-related problems can sometimes be caused by a bad A/C button switch in the panel.
Old 06-09-2009, 02:38 PM
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Default Re: A/c not engaging when its hot?

I have this same problem now on my 94 civic lx. I looked at the compressor the other day day and the clutch engages and then disengages (on/off) very often when hot. Im thinkin about changin the comp. clutch. Maybe have goodyear or someone take a look at the clutch. Ill keep in touch
Old 06-09-2009, 05:05 PM
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Default Re: A/c not engaging when its hot?

One candidate is the soldered joints on the climate control circuit board expanding and failing at high temps. See http://honda.lioness.googlepages.com/airconditioning
Old 06-09-2009, 05:19 PM
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Default Re: A/c not engaging when its hot?

Originally Posted by waaBAAH
check to see if you have airflow.. the ac fan should kick on right away when you hit the little a/c button
Yup it works, but only when the temp is cool out side.

Originally Posted by cueto
I have this same problem now on my 94 civic lx. I looked at the compressor the other day day and the clutch engages and then disengages (on/off) very often when hot. Im thinkin about changin the comp. clutch. Maybe have goodyear or someone take a look at the clutch. Ill keep in touch
All info is welcome, if you find out, please let me know

Originally Posted by honda.lioness
One candidate is the soldered joints on the climate control circuit board expanding and failing at high temps. See http://honda.lioness.googlepages.com/airconditioning
Thanks for the link, I will for sure check this out, Hopefully this would be it
Old 06-13-2009, 09:01 AM
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Default Re: A/c not engaging when its hot?

i am going to try the soldering thing. anyone else have any helpful info
Old 06-13-2009, 09:07 AM
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Default Re: A/c not engaging when its hot?

another thing. if the solders expand when the car is hot would the a/c light turn on still?

Last edited by chrisfromsrq; 06-13-2009 at 09:12 AM.
Old 06-13-2009, 09:08 AM
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Default Re: A/c not engaging when its hot?

i would check the comp. clutch as suggested by cueto
Old 06-13-2009, 11:05 AM
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Default Re: A/c not engaging when its hot?

I ended up finding an old JDM Climate control that I had purchased a while back. I will open it up and compare to see any differences between them. Hope it works
Old 06-13-2009, 03:38 PM
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Default Re: A/c not engaging when its hot?

Originally Posted by RonJ@HT
You might want to do a search. I have read that similar heat-related problems can sometimes be caused by a bad A/C button switch in the panel.
x2
i have read this also.
Old 06-13-2009, 04:22 PM
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Default Re: A/c not engaging when its hot?

Originally Posted by chrisfromsrq
another thing. if the solders expand when the car is hot would the a/c light turn on still?
The light bulb inside the A/C button is triggered by the switch being depressed but it is on it's own circuit board. Once the button is pushed down current from that action lights the bulb. So, even if the switch is failing to start the A/C it is possible for the little light to come on.

The soldering point that is faulty is on the "back" of the circuit board panel. The bulb soldering point is on the front. So, they are 2 different solder points allowing 1 to work while the other doesn't.
Old 07-03-2009, 11:34 AM
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Default Re: A/c not engaging when its hot?

Ok! Ive got an updated question regarding a/c operation. Could a loose or worn out serpentine/drive belt cause the a/c or compressor not to operate properly???

Thanks
Old 07-03-2009, 11:36 AM
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Default Re: A/c not engaging when its hot?

Originally Posted by cueto
Ok! Ive got an updated question regarding a/c operation. Could a loose or worn out serpentine/drive belt cause the a/c or compressor not to operate properly???

Thanks
Yes. Cooling would be poor on non-existent if the A/C belts slips on the crank or compressor pulley.
Old 07-12-2009, 03:47 PM
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Default Re: A/c not engaging when its hot?

What is a good way to see if the belt is too loose to be causing this? I mean should the belt be really noticeably loose or what?

Thanks for all the assistance!
Old 07-12-2009, 10:57 PM
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Default Re: A/c not engaging when its hot?

i think the rule is one inch up and down for every foot of belt across the pulley.


but that sound really weird if you were to have 4 feet between the pulleys resulitng in 4 inches of deflection. lol
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