Re: AC OVER PRESSURE Mystery - Saab 900 Bulletin Board - Saabnet.com
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Re: AC OVER PRESSURE Mystery
Posted by S Carlson [Email] (more from S Carlson) on Mon, 17 Aug 2015 18:55:54
In Reply to: AC OVER PRESSURE Mystery, Scanav, Mon, 17 Aug 2015 11:07:51
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Could be a blockage in the system, or maybe an overcharge, or maybe your condenser fan isn't running. Maybe there's too much oil in the system? In other refrigeration units, an oil log could cause the kind of symptoms you describe, but it usually self-resolves after you turn the system off for a while and the oil settles back to the compressor.
The expansion valve and dryer would be where I would start too, so at least you can rule those out.
What refrigerant are you using, and what do your gauges read?
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