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#504275 - 04/22/08 11:41 AM ac compressor
tom_wasil tom_wasil Member Registered: 03/04/08 Posts: 58 Loc: leesburg, fla	hi reatta lovers 91 r12 ac has been working fine. turned on today and no cold air no compressor turning. switching between modes seems to work but no compressor on ac temp was 80 outside and set at 65 inside .no workee used search for air conditioning and did not see my issue n the last year. where's a good place to start ? thanx _________________________ 91 red coupe s/n 33 from the end smokey yunick says how fa$$$t can you afford to go
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#504287 - 04/22/08 12:28 PM Re: ac compressor [Re: tom_wasil]
DAVES89 DAVES89 Member Registered: 01/06/07 Posts: 656 Loc: Appleton,Wi	First thing I do when A/C stops working is clear the codes. It has always then come back on after that. I do not know how to clear codes on a 90/91 _________________________ BCA & Reatta Club affiliated '93 Roadmaster [Big Momma] '89 Reatta [Little Sister]
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#504289 - 04/22/08 12:34 PM Re: ac compressor [Re: DAVES89]
tom_wasil tom_wasil Member Registered: 03/04/08 Posts: 58 Loc: leesburg, fla	will give it a try - there was no service ac light though thanx _________________________ 91 red coupe s/n 33 from the end smokey yunick says how fa$$$t can you afford to go
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#504295 - 04/22/08 12:40 PM Re: ac compressor [Re: tom_wasil]
nic walker nic walker Long Time Member Registered: 02/03/02 Posts: 3010 Loc: Richmond, Virginia	Disconnect power from the battery so the computer will re set...worked on my 90 when I bought it in 2002. Hasn't acted up since. _________________________ "Mark your place among those who want to reward themselves with a remarkable two-seater motorcar of distinction, sensuousness and impeccable road manners - handcrafted in limited numbers, with that most precious commodity: Time."* *OEM Reatta Bookmark 90 Gray Coupe 90 Select Sixty
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#504363 - 04/22/08 04:18 PM Re: ac compressor [Re: nic walker]
tomt tomt Member Registered: 10/11/04 Posts: 564 Loc: DeKalb IL USA	re-setting codes and disconnecting the battery also worked for me. But don't forget the most important thing!!! A shot of Jack Daniels before you turn the key. Worked for me.
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#504412 - 04/22/08 07:21 PM Re: ac compressor [Re: tomt]
tom_wasil tom_wasil Member Registered: 03/04/08 Posts: 58 Loc: leesburg, fla	hi again disconnected battery for awhile and reconnected no compressor reset codes via hvac controls several times no compressor no bcm codes listed before resetting bcm data was within ranges specified cooling fan running interior fans on auto - high is there a code for low refrigerant ? next step ? - local a/c guy ??? _________________________ 91 red coupe s/n 33 from the end smokey yunick says how fa$$$t can you afford to go
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#504423 - 04/22/08 07:58 PM Re: ac compressor [Re: tom_wasil]
tom_wasil tom_wasil Member Registered: 03/04/08 Posts: 58 Loc: leesburg, fla	is there a fuse on the compressor clutch ? is there a schematic of the two fuse boxes , as to what the fuses control ? _________________________ 91 red coupe s/n 33 from the end smokey yunick says how fa$$$t can you afford to go
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#504493 - 04/23/08 12:24 AM Re: ac compressor [Re: tom_wasil]
D-a-n-i-e-l D-a-n-i-e-l Member Registered: 12/02/06 Posts: 378 Loc: Fort Lewis WA/Iraq	Did you check for voltage at the compressor clutch conection? If it is like th 88-89 then there is not a schematic of just the fuse block. For the most part, the fuses are found in the electrical trouble shooting section of the service manual. In there given system chart. Also, unless they went backwards on there sensors there should be a low "pressure" code. _________________________
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#504555 - 04/23/08 10:29 AM Re: ac compressor [Re: D-a-n-i-e-l]
tom_wasil tom_wasil Member Registered: 03/04/08 Posts: 58 Loc: leesburg, fla	no bcm codes or ec codes present all das blinkin lites seem ok ac controller seems ok connection to compressor seems ok am going to check all fuses _________________________ 91 red coupe s/n 33 from the end smokey yunick says how fa$$$t can you afford to go
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#504562 - 04/23/08 11:25 AM Re: ac compressor [Re: tom_wasil]
tom_wasil tom_wasil Member Registered: 03/04/08 Posts: 58 Loc: leesburg, fla	okey dokey driver side fuse panel 20 amp # 18 compressor now cycles on and off just like the general intended. hope it doesnt blow again _________________________ 91 red coupe s/n 33 from the end smokey yunick says how fa$$$t can you afford to go
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#506074 - 04/29/08 03:21 PM Re: ac compressor [Re: tom_wasil]
tom_wasil tom_wasil Member Registered: 03/04/08 Posts: 58 Loc: leesburg, fla	second time fuse has blown - wheres a good place to start ? seems like it may have something to do with switching to heat mode / or maybe not fuse blows - no compressor clutch replace fuse clutch works for some time then it blew again Edited by tom_wasil (04/29/08 03:22 PM) Edit Reason: added verbage _________________________ 91 red coupe s/n 33 from the end smokey yunick says how fa$$$t can you afford to go
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#506160 - 04/29/08 07:49 PM Re: ac compressor [Re: tom_wasil]
D-a-n-i-e-l D-a-n-i-e-l Member Registered: 12/02/06 Posts: 378 Loc: Fort Lewis WA/Iraq	I would start with the clutch for the compressor. It is what that fuse is powering, if I remember right. The bad news is if that is the case, yo will most likely be replacing the pump/compressor. I hope for you I am wrong about the circuit. _________________________
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#506164 - 04/29/08 08:00 PM Re: ac compressor [Re: D-a-n-i-e-l]
Ronnie Ronnie Member Registered: 05/23/07 Posts: 710 Loc: Tennessee	See if a slow blow fuse is available that will fit. They handle a surge better when the compressor clutch first engages. Might cure your problem if you can find one.. _________________________ Red '88 Buy or sell Reatta cars and parts online. Click Here. It's Free!
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#506170 - 04/29/08 08:14 PM Re: ac compressor [Re: Ronnie]
D-a-n-i-e-l D-a-n-i-e-l Member Registered: 12/02/06 Posts: 378 Loc: Fort Lewis WA/Iraq	That is a great idea, but I would still plan on replacing/repairing the compressor in the future. The electrical components were designed to run on a normal single blow element, so what ever the cause it will continue to decline until it is completely gone. I really do think that the slo blow is a good short term fix. When does it blow? at start up of the compessor or after the compressor has been running? _________________________
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#506180 - 04/29/08 08:36 PM Re: ac compressor [Re: D-a-n-i-e-l]
simplyconnected simplyconnected Member Registered: 11/06/07 Posts: 170 Loc: Detroit (Royal Oak), Michigan	Check A/C clutch coil resistance. If it's zero, you will need a new clutch. Blowing a 20a fuse means power draw, is exceeding 240 watts. Got a continuity light? The cheap 2-penlight battery kind works well (Ideal makes one, or make your own). While you have the clutch disconnected, attach one lead to a clutch connector stab, and quickly wipe the other lead across the other stab. (On a 1-wire connector, use ground for one lead.) You should see a pretty blue spark following your wipe wire, and the bulb should not light. This shows inductance. Try it several times. If you get the sparks, everything is good, and your problem is somewhere else. If you get a strong light with no spark trail, it's shorted. Do this at dusk, or in a dimly lit garage. An engine compartment is a hostile enviroment with lots of vibration, oil, heat, cold, etc. If the compressor checks out, follow the wire loom back, checking all along its length for fraying copper wire. If you find a bad spot, use friction tape, not black plastic electrical tape. Friction tape is cotton and will take heat far better than vinyl. We are not looking for a high-voltage dialectric, just a soft, hearty, insulator.
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