Why the ac wont turn off when car is running and knob is on 0?

Asked by shonw Jun 16, 2017 at 01:17 PM about the 2006 Chevrolet Cobalt LS Coupe FWD

Question type: Maintenance & Repair

We try to turn ac off while driving and it keeps blowing. Same thing when
parked and running. Knob is put on 0 and it still is on.

2 Answers
9,230

K answered 6 years ago

sounds like the knob is broken.

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GuruWXMFY answered 6 years ago

I changed my resistor,nope,same thing. Then I changed relay,nope,same thing. Then I replaced switch for 18 bucks online,worked fine till I hit a bump then you guessed it...same thing. I took control panel out with car running and fan shut off, put it back in and it started blowing again. After inspection of switch wires I found one wire rubbing against metal support bracket, tapped it up real good...problem solved. Hope this helps someone.

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