Blower motor stays on

Tiny
MRMERK
  • MEMBER
  • 2004 LINCOLN NAVIGATOR
  • V8
  • 4WD
  • AUTOMATIC
  • 110 MILES
My SUV's blower will not stop blowing. I mean the heat and AC works, but just blows on high continuously. Any advice?
Thanks,
Blowing continuously.
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Friday, June 10th, 2011 AT 12:50 PM

5 Replies

Tiny
DOCFIXIT
  • EXPERT
Hello,

This is because either the blower motor relay is stuck on or the speed resistor is burnt up and need to be replaced. I would do the blower motor as well because it can cause the electronics to go out. Here are two guides and diagrams below to help us get the problem fixed:

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

and to test the relay:

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

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

Cheers
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Friday, June 10th, 2011 AT 1:29 PM
Tiny
HLACEFIELD
  • MEMBER
Thank you so much for this post! I got a new speed controller and blower motor all fixed! I love this site.
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Friday, August 31st, 2018 AT 10:26 AM
Tiny
TIMCSHEW
  • MEMBER
  • 2001 LINCOLN NAVIGATOR
  • V8
  • 4WD
  • AUTOMATIC
  • 163 MILES
My blower comes on when I turn my car off. I have changed the ignition switch no help. I can start car and blower will go off work okay, but when I turn it off it comes on you can pull the fuse and it will go off. I have also noticed the the anti theft light blink's faster and the digital mile counter light up but only on the very bottom lines of the read out. No shorts, I would think it would run all the time if it was a short. I am thinking about changing the blower relay?
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Friday, August 31st, 2018 AT 10:27 AM (Merged)
Tiny
RASMATAZ
  • MEMBER
Blower motor relay could be sticking and constantly powering it-check and test it and get back with me.
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Friday, August 31st, 2018 AT 10:27 AM (Merged)
Tiny
TIMCSHEW
  • MEMBER
That did not work. Relay good, can the key tumbler be bad or the climate controls? I do here a clicking which is probably relay be powered up.
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Friday, August 31st, 2018 AT 10:27 AM (Merged)

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