Re: ac compressor not coming on - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: ac compressor not coming on
Posted by carl [Email] (more from carl) on Sun, 8 Jun 2008 08:32:46
In Reply to: Re: ac compressor not coming on, Ron, Sun, 8 Jun 2008 06:43:57
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How do you know what the pressure is? You need gauges with a high and low side reading. 40 is too low of a reading from either side with the compressor off.
The most likey cause is loss of freon(r134a). Was the A/C cold before your recent loss of compressor? The 134 may have been leaking slowly for a year or more. NG 900 are known for a slight leak on the line from the copressor to the reciever/dryer.
Also, if you are going to attempt to override the pressure switch or relay; only do it for about 15-20 seconds. If there is freon in the system and you allow the pressure to build too high it will trigger the blow off valve on the compressor. If that happens you will definately lose your freon and most likely permantely damage the compressor. A new one is about $800.
Good luck
posted by 71.188.118...
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