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Diagnose AC high pressure switch 900 1993

posted by  mila on  Tue Aug 4 02:35 CST 2020
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last visit: Fri Sep 5 06:26 CST 2014
[RELATED]

Hello,

Any suggestions how to diagnose the high pressure switch in the AC system?
Not the emergency cut-out switch in the condensor, but the one that should start the cooling fan in high speed.
The low speed switch seems to work OK but I am not sure the fan ever runs in high speed.

Mila






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