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a/c compressor not engaging [message #345140]

Thu, 11 July 2019 14:36

Deb

Messages: 349
Registered: October 2016
Location: Logan Lake, BC

Karma:

Senior Member

Back again. My dash a/c got up and running last summer. (Ran great! Cold knees Smile

) We recharged with R12a since it was empty. I'm in Canada plus it had been converted to 134 in a previous American life so the fittings were compatible. This summer though, no cold. Checked the low side static pressure and it is sitting at 32 psi. I don't have a gauge for the high side (yet) so i don't know where that sits right now. Low side static I believe should be sitting somewhere in the 70's? So when I turned the coach on and turned on the a/c, I was expecting it to drop. It didn't move. I think I hear a bit of a clicking when I turn on the a/c but I'm pretty sure the compressor isn't engaging. Have to stick my head into her to check for sure. But in the meantime...

Question here is, what would you consider a low enough low side static pressure that the compressor won't engage simply because it is too low on refrigerant? If the compressor doesn't engage, then that static pressure won't change when I "turn on" the a/c, correct? I have a recharge kit for the R12a and am happy to top it off. But thought I would run it by you folks first and see what your educated opinion is. Would it hurt to add a half can of the 12a to bring that pressure up and see if that does the trick?

I know there are a myriad of things that it could be, but thought I would start with one of the things I could possibly address myself without too much difficulty. Or am I so far off the mark I should turn around and hang my head.

Don't want to wander around blindly throwing things at it without some 2nd, 3rd and "n"th opinions.

Deb McWade Logan Lake, BC, CAN GMC Alumnus It's Bigger on the Inside!

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[Message index]

		a/c compressor not engaging By: Deb on Thu, 11 July 2019 14:36
		Re: a/c compressor not engaging By: lqqkatjon on Thu, 11 July 2019 15:02
		Re: a/c compressor not engaging By: Deb on Thu, 11 July 2019 15:34
		Re: a/c compressor not engaging By: Deb on Thu, 11 July 2019 17:34
		Re: a/c compressor not engaging By: roy1 on Thu, 11 July 2019 20:40
		Re: a/c compressor not engaging By: Deb on Thu, 11 July 2019 21:10
		Re: a/c compressor not engaging By: Deb on Thu, 11 July 2019 22:02
		Re: [GMCnet] a/c compressor not engaging By: emerystora on Thu, 11 July 2019 23:16
		Re: [GMCnet] a/c compressor not engaging By: Deb on Fri, 12 July 2019 00:00
		Re: [GMCnet] a/c compressor not engaging By: roy1 on Fri, 12 July 2019 00:46
		Re: [GMCnet] a/c compressor not engaging By: emerystora on Fri, 12 July 2019 08:29
		Re: [GMCnet] a/c compressor not engaging By: Deb on Fri, 12 July 2019 13:59
		Re: [GMCnet] a/c compressor not engaging By: Deb on Fri, 12 July 2019 17:01
		Re: [GMCnet] a/c compressor not engaging By: 6cuda6 on Fri, 12 July 2019 18:10
		Re: a/c compressor not engaging By: Chris Tyler on Fri, 12 July 2019 06:06
		Re: a/c compressor not engaging By: Ken Burton on Sat, 13 July 2019 02:14
		Re: [GMCnet] a/c compressor not engaging By: Ken Henderson on Sat, 13 July 2019 06:41
		Re: [GMCnet] a/c compressor not engaging By: Deb on Sat, 13 July 2019 11:23
		Re: [GMCnet] a/c compressor not engaging By: Deb on Sat, 13 July 2019 16:38
		Re: [GMCnet] a/c compressor not engaging By: Ken Burton on Sat, 13 July 2019 23:48
		Re: [GMCnet] a/c compressor not engaging By: Deb on Sun, 14 July 2019 13:58
		Re: [GMCnet] a/c compressor not engaging By: Deb on Sun, 14 July 2019 15:12
		Re: [GMCnet] a/c compressor not engaging By: Ken Henderson on Sun, 14 July 2019 15:41
		Re: [GMCnet] a/c compressor not engaging By: 6cuda6 on Sun, 14 July 2019 16:40
		Re: [GMCnet] a/c compressor not engaging By: Deb on Sun, 14 July 2019 16:43
		Re: [GMCnet] a/c compressor not engaging By: Deb on Sun, 14 July 2019 17:17
		Re: [GMCnet] a/c compressor not engaging By: Ken Burton on Sun, 14 July 2019 17:44
		Re: [GMCnet] a/c compressor not engaging By: Deb on Sun, 14 July 2019 18:59
		Re: [GMCnet] a/c compressor not engaging By: emerystora on Sun, 14 July 2019 14:35
		Re: [GMCnet] a/c compressor not engaging By: Deb on Mon, 15 July 2019 09:55
		Re: [GMCnet] a/c compressor not engaging By: Deb on Mon, 15 July 2019 12:38
		Re: [GMCnet] a/c compressor not engaging By: emerystora on Mon, 15 July 2019 13:22
		Re: [GMCnet] a/c compressor not engaging By: Deb on Mon, 15 July 2019 13:39
		Re: [GMCnet] a/c compressor not engaging By: k2gkk on Mon, 15 July 2019 14:14
		Re: [GMCnet] a/c compressor not engaging By: Deb on Mon, 15 July 2019 14:53
		Re: [GMCnet] a/c compressor not engaging By: Deb on Wed, 14 August 2019 13:53
		Re: a/c compressor not engaging By: jhbridges on Wed, 14 August 2019 15:58
		Re: a/c compressor not engaging By: JohnL455 on Wed, 14 August 2019 17:52
		Re: a/c compressor not engaging By: JohnL455 on Wed, 14 August 2019 17:54
		Re: a/c compressor not engaging By: Deb on Wed, 14 August 2019 18:27
		Re: a/c compressor not engaging By: JohnL455 on Thu, 15 August 2019 11:28

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