Question about 2002 Chevrolet Impala

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Fans not working dual fans - 2002 Chevrolet Impala

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There are several relays for the fans Low speed relay, high speed relay, and the A/C relay. Check to see if they operate in any of these modes.

There is one fuse for each fan, usually in the Maxi fuse relay center on the firewall.

Make sure you have continuity through both fans with a DVOM as both fans might be bad. Them use it to see if you are getting power to the fans, as well as ground.

Posted on Oct 23, 2013


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What did I miss?

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The one fan willl not come on but both will when motor is hot

I'm not familiar with your particular car, but this info may be of some help to you...

Dual fan cars work in a few ways:
1) Some only use one fan during normal cooling, and turn on the second either when the temperature reaches a certain level, and/or when the air conditioning is running.
2) Some use both fans for normal cooling, but at least one of the fans have a dual-speed motor. Generally only one has dual-speed motor, which operates at low speed during normal cooling cycles, and operates at high speed at a predetermined temperature, and/or when the air conditioning is running.

Based on this, it's possible that your system is working correctly, or you have the chance that your low speed portion of the cooling system is not functioning. Check the wires going to the fans. If there are only two wires, then it's a single speed fan. If there are three wires, it's a dual speed fan.

Based on that information, you should be able to determine if your system is working correctly or not.

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I'm not sure about the sentra, but I know that in my 1998 Eclipse, which has a dual cooling fan, one of the fans is a backup. You might want to make sure of that before you go buying fuses and relays.

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