AC Compressor Shutting Off - ZR-1 Net Registry Forums

402Z · 10-23-2023

Wondering if anyone else has had this issue... Every time the coolant temp reaches ~212 degrees F, the AC compressor shuts off and does not turn back on until the coolant temp cools to ~195-200 degrees F. It is a brand new R12 compressor filled with R12 freon. I am getting cold AC while the engine is warming up to 212. No fault codes in the climate control module. I am wondering if the high side pressure is getting too high? Let me know what y'all think. Thanks

Mikey · 10-24-2023

Was there any ECM programming by GM perhaps to reduce load when engine was warm? Seems this sort of measure wouldn?t be implemented until higher temp but maybe..

10-23-2023	#1
402Z Join Date: Sep 2021 Location: Florida Posts: 29	AC Compressor Shutting Off Wondering if anyone else has had this issue... Every time the coolant temp reaches ~212 degrees F, the AC compressor shuts off and does not turn back on until the coolant temp cools to ~195-200 degrees F. It is a brand new R12 compressor filled with R12 freon. I am getting cold AC while the engine is warming up to 212. No fault codes in the climate control module. I am wondering if the high side pressure is getting too high? Let me know what y'all think. Thanks __________________ Bryan '91 EES 402 Red/Red #1813

10-24-2023	#2
Mikey Join Date: Jul 2020 Location: Nashville TN Posts: 301	Re: AC Compressor Shutting Off Was there any ECM programming by GM perhaps to reduce load when engine was warm? Seems this sort of measure wouldn?t be implemented until higher temp but maybe..