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Customers trailblazer a/c clutch

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3 years 9 months ago #41647 by james.hayes
Customers trailblazer a/c clutch was created by james.hayes
Hello guys and gals, 2008 trailblazer 4.2. Customer complains about having to remove the ECM fuse and putting it back in to get her AC compressor to engage.. The AC may work or may not work all day long but regardless it will happen every day.. i’m thinking I have a bad ECM but I’m unclear on what kind of testing I need to do to resolve this issue.. I have no other trouble codes.. Any suggestions would be helpful thank you

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3 years 9 months ago #41650 by Chad
Replied by Chad on topic Customers trailblazer a/c clutch
The first thing I would do is make sure you have a proper refrigerant charge. Many GM AC systems will disable if the charge is too low. The clutch will not re-engage until the codes are reset or the battery disconnected. Removing the ECM fuse would do the same.
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right. :-)

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