a/c cluch problems

[Bob S]

My 93 40th anav.coupe has a compressor cluch that wont engage.The dash controls are also blinking.Tryed to reset ecm by disconnecting battery,no good.Tryed to find codes in the dash control but when you push the up&down arrows on the fan control,nothing happens.Also where is the compressor control relay located? X-ray scaner shows code 28.This is a quad 3 driver modual.Would I have to replace the ECM for this problem. Help,anyone; Bob S

 

[Magmotor]

#31 is what your looking for. I wouldn't be too quick to replace an ECM. There are several ways on my '89 to check for a good or bad A/C comp clutch. I'm sure someone with a '93 will jump in here and tell ya how. My two cents says it's the A/C Controller Mod....

 

[Vette_Newb]

My electronic A/C control flashed, blinked went out, came on all kind of crazy stuff. I took it all apart and cleaned all the connectors inside and it has worked perfect for several weeks now.

Good luck.

 

[whsteele@bellsouth.net]

AC problems

Bob did you get this resolved. I can not believe it but I have a 93 and just today 3/19/04 I am having exactly yes exactly same problem. Blinking and all. I have checked just about everything including the charge.

Please let me know if you have an answer.

Regards,

Wayne S.

 

[MBDiagMan]

The most common cause would be a low charge. When low the high pressure switch interrupts the compressor circuit to prevent damage to the compressor.

Hope this helps,

 

[Bob S]

Bob did you get this resolved. I can not believe it but I have a 93 and just today 3/19/04 I am having exactly yes exactly same problem. Blinking and all. I have checked just about everything including the charge.

Please let me know if you have an answer.

Regards,

Wayne S.

Hi Wayne; This problem can be a pain in the butt.My problem turned out to be a low charge.The blinking lights are a trouble code.If you press the up and down fan controls at the same time untill a double00 comes up you can access the trouble codes by pressing the fan switch.Go to tech knowledge base and in serch type in a/c control circuit diagnosis and see 1990 service bullentin.you can print out the codes.Also circuite diagrams. I hope this helps some. Bob S