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Cooling fans on high 5 sec after startup

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Old 02-09-2023, 04:21 PM
gigolojew's Avatar
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Default Cooling fans on high 5 sec after startup

I have a 2007 Silverado 1500 classic 5.3 4x4
5 sec after I start the engine the radiator fans kick on high speed until I shut it off.( It sounds like a jet) I have replaced the temp sensor and the relays in the hidden compartment next to the fuse box for the cooling fans and still no bueno. Any suggestions would be amazing
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Last edited by gigolojew; 02-09-2023 at 04:26 PM.
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Old 03-01-2023, 10:26 AM
hyduja's Avatar
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My 2016 F150 V8 had a very loud fan and I changed the pressure switch and thermostat. Neither helped. I took it to the shop and my high pressure freon read 300psi when the truck was off.



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Last edited by hyduja; 03-02-2023 at 03:03 PM.
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