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AC/heat not blowing

Tiny
MMATTINGLY
  • MEMBER
  • 2009 NISSAN SENTRA
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 167,000 MILES
Just picked my car up from the mechanic where had the blower motor replaced. Got 3/4 way home and was blowing fine, then just stopped again. Fuses are not blown. Any thoughts?
Tuesday, August 20th, 2019 AT 1:55 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Welcome to 2CarPros.

Does it work on any speed? If not, the first thing I would check is the blower motor relay. It is located on the left side under the dash. I attached a picture of the relay and the location.

If you find a relay with the same part number, switch them. If you don't, here is a link that shows how to check a relay:

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

Here are a few links you may find helpful when testing:

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. If the fan still works on the high setting only, let me know.

Take care,
Joe
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Tuesday, August 20th, 2019 AT 7:45 PM
Tiny
MMATTINGLY
  • MEMBER
  • 2 POSTS
Not the relay. Not the fuses and not the resistor. Mechanic did not know why was working and just quit. Could it be control panel?
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Thursday, August 22nd, 2019 AT 12:53 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Welcome back:

It could, but to confirm it I would be checking the things I mentioned first. If they all pass, then he will have to check the control panel. It could even be a bad or weak ground.

Let me know if I can help.

Joe
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Thursday, August 22nd, 2019 AT 9:34 PM

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