ok when my temp gauge stops working so does my a/c and heat and it says engine hot a/c turned off eve if the truck has been sitting all night in 30 degree weather all fluids are good truck is not actually running hot and as soon as my temp gauge starts working everything else starts working again and it stops saying engine hot A/Cturned off any suggestions?

Asked by Jan 24, 2017 at 10:20 PM about the 2007 Chevrolet Silverado 1500 1LT RWD

Question type: Maintenance & Repair

when the temp gauge stops working the a/c and heat stop working and it says engine hot a/c turned off and automatically turns my ac off all fluids are good replaced water pump and thermostat and had the heads checked and they are good any suggestions

2 Answers

139,665

I would start by replacing the temperature sending unit. If this is bad, it affects everything on the engine. Not sending the computer the right information it needs to adjust other sensors.

4 people found this helpful.

I have replaced thermostat AND sending unit twice. Problem did not go away.

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