My AC keeps blowing hot air and engine overheats when AC is turned on

2004 CADILLAC ESCALADE ESV
168 MILES • V8 • AUTOMATIC
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ISABEL MARTINEZ
  • MEMBER
  • 1 POST
I took off the thermostat to avoid overheating. I already changed the fan clutch, radiator, AC compressor, the water pump, and some hoses. It still overheats when the AC is turned on with the thermostat on and blows hot air.
Sep 17, 2018 at 1:07 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,840 POSTS
  • ASE Certified Mechanic
Hello,

The engine needs the thermostat so you will need to reinstall that and clear the codes. Next lets test the engine for a blown head gasket by following this guide.

https://www.2carpros.com/articles/head-gasket-blown-test

This guide can help as well.

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Please run down these guides and report back.

Cheers, Ken
Sep 18, 2018 at 4:13 PM
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