A/C blower not working

Tiny
MARTYMINOGUE
  • MEMBER
  • 1998 CHEVROLET 1500
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 260,000 MILES
Hi,

So my issue began when I could not set my A/C to high. It would only work in low-medium. Then in the winter, when I would turn on the heat, there was a loud screeching sound. Then the blower stopped working all together. The A/C and heat still work, I can feel cold air coming from the vents. I have replaced the blower motor relay and the blower motor. I am not sure what else to try.

The blower stopped working a few months ago, but a couple days ago the radio stopped working also. Not sure if they are related. There is still power to the radio, and I can change the station but no sound is coming out.

Any help would be appreciated! I can try out suggestions as they come or give any more information as needed. Thanks!
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Wednesday, July 10th, 2019 AT 2:58 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
Welcome to 2CarPros.

First, we need to make sure there isn't a fuse problem. Take a look at pics 1 - 4. I highlighted what needs checked. The first two pics are the fuse box in the vehicle, and the second 2 are under the hood.

If the fuses are good, the next thing that needs checked is the blower motor relay. See picture 5 for location. It's not far from the resister you replaced. If it is bad, you won't get power to the resister.

Here are a few links to help with the checking:

https://www.2carpros.com/articles/how-a-car-fuse-works

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

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

https://www.2carpros.com/articles/how-to-use-a-voltmeter

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

________________________________________

Let me know what you find or if you have other questions. Also, make sure by accident the relay wasn't left unplugged.

Take care,
Joe
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Wednesday, July 10th, 2019 AT 9:39 PM

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