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Bad AC pressostat 900

posted by  Choices on  Fri Apr 11 06:42 CST 2008
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last visit: Fri Aug 16 10:32 CST 2013
[RELATED]

The car I'm asking about is a 90 760 with the OEM AC upgrade kit for R134 - more similar to 900 series - thus the post here...

The system cycles off/on quite rapidly, independent of low pressure (by my gauge), but when the switch leads are shorted, the system runs/cools properly. Seems like a bad switch. So ..

Does the system have to be evacuated to replace the switch or is there a Schrader (spelling?)valve connection on the accumulator, or is the whole accumulator/switch one unit? Any info is appreciated. Thanks.

Jim Weiss
90 744T/M46, 90 760T, 93 945T, 94 945T
and, sadly, 83 245T/M46 soon on the block





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