Blower fan not working.

Tiny
ROYHOBBS
  • 1997 GMC SIERRA

V8 four wheel drive automatic 180,000 miles.

No air coming out when fan switch is turned to any setting. Tried replacing the fuse (in cab) but did not work. Owner's manual says there is also a under hood blower fuse/relay which I have not replaced yet. Was working just fine yesterday and have had no problems with it before. Thanks for the assistance.

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Friday, December 11th, 2009 AT 6:39 PM

4 Replies

Tiny
BLUELIGHTNIN6
  • EXPERT
  • 16,912 POSTS

First check blower motor relay as your manual states. If okay then check your heater control switches. If they are okay as well then suspect faulty blower motor.

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Friday, December 11th, 2009 AT 6:48 PM
Tiny
ROYHOBBS
  • MEMBER

Thanks, I will try the other fuse but I currently do not have a service manual for this vehicle so not sure how to check the heater switches.

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Friday, December 11th, 2009 AT 7:07 PM
Tiny
BLUELIGHTNIN6
  • EXPERT
  • 16,912 POSTS

Your blower motor relay is located on top of the front A/C-heater blower housing, in dash.
Follow the link here to get an idea of how to test the blower motor relay.

http://www.2carpros.com/how_to/how_do_i_check_a_relay.htm

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Friday, December 11th, 2009 AT 7:10 PM
Tiny
ROYHOBBS
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Thanks for the help, turned out to be the blower motor after all.

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Saturday, December 12th, 2009 AT 10:54 PM

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