Fan fuse keeps blowing, my car keeps overheating and the heater is not working

CJGOCHEBOI

MEMBER
2009 CHEVROLET EQUINOX
3.4L
V6
2WD
AUTOMATIC
140,000 MILES

My car consistently overheats but won't turn the heat on. I replaced the radiator fans, but it still overheats. I've also done a coolant flush (haven't burped it). I went through about three fuses in one day.

Sunday, February 27th, 2022 AT 2:47 PM

3 Replies

WENDY W

MECHANIC
86 POSTS

Hello,

According to the schematics for this vehicle, it looks like there are two separate fan fuses. I've attached diagrams (below) for your reference. Have both fuses been blowing or just one? Do the fuses blow if the fan motors are not plugged in?

It sounds like possibly the wiring harness is shorting to ground somewhere on the vehicle.

Here are a few repair guides that may help you trace the problem:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/engine-cooling-system

https://www.2carpros.com/articles/how-to-check-wiring

Please let us know what you find, and if there's anything else we can help with.

Thanks! Wendy W.

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Monday, February 28th, 2022 AT 6:03 AM

CJGOCHEBOI

MEMBER
2 POSTS

It's just the fuse for the fan directly in front of the engine. I will keep you updated as I try to check the electrical harness. Thank you!

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Monday, February 28th, 2022 AT 8:24 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

Just to add to this, try disconnecting the coolant sensor with the key in the on position and see if the fans kick on. By doing that, it sends a high temperature signal, and the ECM should turn on the fans.

Do the fans come on with the A/C on?

Roy

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