A/C recharge and Tech 2 pressure readings. - Saab 9-5 Bulletin Board - Saabnet.com
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A/C recharge and Tech 2 pressure readings.
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Posted by Brian (more from Brian) on Sat, 29 Jul 2017 03:25:50 Share Post by Email
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04 Aero with 180k. Bought the car at 75k and never touched the ac until last year. Added a few shots of pure 134a last year and this year and its been ok. I know with the variable output compressors it is supposed to be charged by weight but don't want to deal with the hassle of going that route.

My Tech 2 says the pressure is at 6-7 bar with the ac not on. With it on it climbs to 18 bar and the fan kicks on and cuts off at 14 bar. Based off the tech 2 readings it seems to regulate it at 14-18 bar. According to the tech 2 the vent temp was around 55 with an outside air temp of 80.

Should I add a little more 134a or just let it be? The ac seems ok to me but not as cold to other cars/trucks I drive.


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