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Re: [GMCnet] a/c compressor not engaging [message #345353 is a reply to message #345349] Mon, 15 July 2019 13:22 Go to previous messageGo to previous message
emerystora is currently offline  emerystora   United States
Messages: 4442
Registered: January 2004
Karma:
Senior Member
If you are at 30 psi at 1500 rpm you can likely get it cooler if you drop the pressure to perhaps 25 psi.
Your leak over the winter is likely from the seal on the clutch. The oil keeps this from leaking but if it sets over a winter it can dry out and leak a little. If you start the air conditioner once a month the seal will get lubricated and may solve your slow leak problem.

Emery Stora

> On Jul 15, 2019, at 11:38 AM, Deb McWade via Gmclist wrote:
>
> Hopefully, this thread can now come to an end. There is no leak in the low pressure tube that I can find at the point I suspected - no bubbles & it
> has held it's static pressure at roughly 60 psi , which was where it was before the past few days of trouble-shooting the blower. I did clean the
> connections on the low pressure cut-off switch to make sure I got a good connection.
>
> Started her up and running low side started at 25 psi and slowly climbed to 30, where it sat for 15 minutes. I started just running the a/c on Norm
> with the fan speed at high. Since everything seemed to be going well, I popped it into Max. Ran like that for another 10 minutes. Low side running
> holding nicely at 30 psi.
>
> Looks like my initial problems were:
> 1 Not enough refrigerant so the compressor wouldn't kick in. By-passed the switch and she worked fine. Added a can of R12a to get the volume up to
> minimum.
> 2 Plugged the low pressure switch back in after adding a can. Then the clicking of the switch started.
> 3 Then the blower quit (may have been completely coincidental).
>
> So now, cleaned the connections on the low pressure switch in case after disconnecting it, I lost a good connection. No more clicking. Blower
> working well (knock wood). An air leak around the motor casing and at the cooling hose (not big, but I would like to seal those up) and the a/c
> blowing nice, cold air again.
>
> Since I did lose some refrigerant over the winter, I obviously have a leak (small) somewhere. But at this point, I am going to leave well enough
> alone!
>
> Thanks to all.
>
> Next job - replace the LOP switch and oil filter adapter gaskets and starter bracket on the Onan. But those may also wait till after my trip to
> Washington.
> --
> Deb McWade
> Logan Lake, BC, CAN
> "Li'l Sister"
> '77 Kingsley, 403, EBL EFI;
> TZE167V101404
> It's Bigger on the Inside!
>
>
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