Why does my 2002 impala engine blow air while off?

Asked by Guru9TKHC1 Mar 26, 2021 at 05:04 AM about the 2002 Chevrolet Impala LS FWD

Question type: General

So when I park my 2002 impala and shut the
engine off the engine will start making a
blowing sound. Didn't think too much of it
but it killed my battery the next day. Not a
car guy and this is legit my first. Tried
reading up on it but found nothing. Need
some help

2 Answers
157,615

James answered 3 years ago

Check the radiator cooling fans. If they're running after the ignition is turned off I'd suspect a bad fan relay in the underhood fuse box. There's 3. One for each fan motor, low speed, and a third for both fans, high speed. Remove the relays, one by one until the fans stop. That should be the bad (stuck) relay. Hope that helps! Jim

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35,335

lrodri911 answered 3 years ago

It is normal for the cooling fans to stay on after you turn engine off but only for a couple minutes depending on temperature. If they're staying on for hours then either a bad temperature sensor by the radiator or stuck relay as mentioned above.

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