2006 Chevrolet Malibu Maxx LT Cooling Fans Only Come On With AC

Asked by 06MalibuMaxxLT Jul 10, 2022 at 05:56 PM about the 2006 Chevrolet Malibu V6 LT FWD

Question type: Maintenance & Repair

The radiator fans on my '06 Malibu only turn on with the AC. The farthest the
temp has gone on the gauge is halfway to the third needle, right before the
red. Anyways, I have replaced the thermostat and coolant temperature
sensor with OE parts, checked the fuses/relays, and haven't found a
solution. I got the car above the midline and then disconnected the CTS to
make the fans run on default mode. They came on high, but then I plugged it
back in and the fans cut off right as the needle hit the middle line. Any
suggestions/advice?

3 Answers
312,275

Gene answered 3 years ago

It is possible that the programming got messed up, if that’s the cause a reflash could fix the problem. There was a small area where they used a cooling fan switch but I think by your year they went with the computer controlled fans. But I would absolutely get a good shop to check it out cause you don’t want to blow an engine.

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159,155

James answered 3 years ago

Do you know what the actual temperature of the coolant is when the fans switch on? Also, if you have 3 fan relays each fan has its own relay and the third is the high speed fan relay. Sounds like one of the low speed relays might be bad. The fans will usually come on at about 210°F, low speed. If the temperature continues to climb to around 220°F, which is what you're describing, they switch to high speed. Hope that helps! Jim

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