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Blower motor will not turn off

Tiny
4019
  • MEMBER
  • 2014 CHEVROLET EQUINOX
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 48,000 MILES
With AC on blower motor runs on number 12 at any position on switch. I have replaced the resistor pack it is digital same result.
Saturday, July 14th, 2018 AT 8:51 AM

9 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,047 POSTS
Hello.

It sounds like the HVAC controller is having a problem, but just to be sure can you confirm the part you replaced is the same in the diagrams below? Also, I have included the blower fan wiring so you can see how the system works.

Check out the diagrams (below). Please let us know.

Cheers, Ken
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Monday, July 16th, 2018 AT 11:37 AM
Tiny
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That is the part that I replaced with no result.
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Monday, July 16th, 2018 AT 1:23 PM
Tiny
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How is the blower fan relay mark and what is its location?
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Tuesday, July 17th, 2018 AT 7:56 AM
Tiny
4019
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Thank you for your reply Ken, the schematic swear helpful still need the location of the blower fan relay.
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Tuesday, July 17th, 2018 AT 8:30 AM
Tiny
KEN L
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There is no relay just the power resistor and the controller. Can you see if the red and black wire has power to power resistor? Also check the ground (black) wire.

Here are are two guides that should help:

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

and

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

Use can use a test tight as well.

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

Please run down these guides and report back.

Cheers, Ken
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Tuesday, July 17th, 2018 AT 11:10 AM
Tiny
4019
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Hi Ken, yes the red wire has 12 volts and the black wire ohms out to ground.
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Tuesday, July 17th, 2018 AT 12:08 PM
Tiny
KEN L
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  • 43,047 POSTS
If the blower motor runs and you already replaced the power resistor it only leaves the control head. Here is a diagram to help you remove it I would try a used one but you may need to get it initialized.

Is there any wiring damage that you can see? Has the car been wet inside?

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken
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Wednesday, July 18th, 2018 AT 9:55 AM
Tiny
4019
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Hi Ken, no wire damage and has not been wet I will try a used control head. Thank you for your help I will let you know how it turns out.
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Wednesday, July 18th, 2018 AT 11:06 AM
Tiny
KEN L
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Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Thursday, July 19th, 2018 AT 10:04 AM

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