Which relay controls AC compressor? AC Frustration - Saab 9000 Bulletin Board - Saabnet.com
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Which relay controls AC compressor? AC Frustration
Posted by Robert Kaplan (more from Robert Kaplan) on Wed, 2 May 2001 15:46:05
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I am having a weird problem with the ac in my 93 cs non-turbo. With ACC set at 62 or higher, the ac comes on, gets really cold, cycles on and off for awhile, then cycles off and does not come back on. The low side pressure seems to be fine (can only check low side with cheapo gauage set), and when compressor cycles off and does not come back on, pressure increases exactly as it does in my other 9000 when ac is turned off.
This does not happen when ACC is left on "LO" and compressor does not cycle off. Also, after car sits for 20 - 30 min., AC works again for a limited time.
I suspect that the ac compressor relay is overheating with the on and off cycling and is not working. I called dealership for part price and was told there are four identical relays controlling ac functions. Does anyone know which one controlls the compressor?
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