ac not working
Thread Starter
Instructor
Joined: Sep 2007
Posts: 192
Likes: 0
From: Waynesville North Carolina
ac not working
hi, My 85L98 with manual ac is not working (blowing hot). the compressor will not come on. when guage is hooked to low side, guage points to green. so I am assuming charge is good. fuse is also good, but i cannot seem to locate the relay for the ac. also, all the stickers indicate R12, but all the fitting are 134 fittings???? what a pita this is turning out to be. any help would be appreciated.
Thanks
Mike
Thanks
Mike
Thread Starter
Instructor
Joined: Sep 2007
Posts: 192
Likes: 0
From: Waynesville North Carolina
now what?
Last edited by carolinamountains; Aug 8, 2009 at 09:19 PM.
Burning Brakes
Joined: Feb 2009
Posts: 785
Likes: 3
From: Richmond Virginia
The system has likely been retrofitted from R-12 to R-134... also sounds like it's low on R-134 since the jumper caused the compressor to engage. The correct way at this point would be to evacuate and recharge the system. Whoever did the retrofit should have placed a sticker under hood w/the proper amount of r-134 to use. I'd guess 1.1 to 1.3 lbs BUT that's just a guess. You might try adding a can to the system (leave the switch jumpered while adding) but getting the proper amount in will be a guess. It would be good to have a set of AC gauges hooked up to the low and high side at this time. R-134 systems don't use near as much as the R-12s so disregard the R-12 stickers. It would also be a good idea to add AC oil to the system.
Instructor
Joined: Sep 2004
Posts: 216
Likes: 4
From: Linton Indiana
I hate to spoil things but it's possible the previous owner didn't have any R-12 gauges and they're hard to find new so he may have converted the fittings so he could use R134 gauges but left R12 in the system. You never know.
Thread Starter
Instructor
Joined: Sep 2007
Posts: 192
Likes: 0
From: Waynesville North Carolina
system was evacuated of freon and new 134a was added. still nothing when the switch is hooked back up. after tapping on the switch (low pressure cuttout) the compressor came on.
I figure now that the original problem was probably faulty switch with the system maybe a little low on freon. now its all working again and I know fer sure I got 134a. and I put the stickers in there that says 134a
Thanks for the help guys
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
system was evacuated of freon and new 134a was added. still nothing when the switch is hooked back up. after tapping on the switch (low pressure cuttout) the compressor came on.I figure now that the original problem was probably faulty switch with the system maybe a little low on freon. now its all working again and I know fer sure I got 134a. and I put the stickers in there that says 134a
Thanks for the help guys
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