Sight glass question - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Sight glass question
Posted by Derek in Durham [Email] (more from Derek in Durham) on Thu, 14 Aug 2003 18:38:28
In Reply to: AC Thermo switch worry..., Nick K., Thu, 14 Aug 2003 09:59:54
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Just because you have bubbles in the sight glass doesn't mean there is a leak there or a leak at all.
Don't quote me on this, but I believe Dean stated in past posts that the sight glass method of recharging is not reliable for R134a. Specifically, I believe that some bubbles are supposed to remain. So you need to check the pressure instead. See recent posts in the last couple days by many on this.
But it's true that with old R12 freon systems (i.e., classic 900s) the sight glass could be used to gauge the amount of refrigerant in the system.
No idea about the thermoswitch thread question.
Derek / 1994 900 S V6 134,200mi
posted by 66.57.252...
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