Re: A/C overheat cutoff switch replacement - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: A/C overheat cutoff switch replacement
Posted by Dean [Email] (more from Dean) on Mon, 11 Jun 2007 13:10:04
In Reply to: A/C overheat cutoff switch replacement, John Burnett, Mon, 11 Jun 2007 12:52:12
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I have never dealt with that myself.
Need to point out that a failed anti-frost switch on the evaporator will cause the cutoff switch to cycle then fail. A new one can do the same.
I have always suspected that the problem may be a low charge that allows the low side pressure to be too low which drives the boiling point low enough to frost up the evaporator. Earlier models did have a frost switch that was prone to failure as well.
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