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2003 Chevy Silverado blower fan

Tiny
ROB3
  • MEMBER
  • 2003 CHEVROLET SILVERADO
Heater problem
2003 Chevy Silverado Four Wheel Drive Automatic 105, 00 miles

Yesterday I went to start the P/U. Battery was dead.
Replaced the battery and it started right away.

I now noticed that I couldn't raise or lower the blower speed. It was stuck in high speed. The control button showed that it went up faster or slower. But there was no actual change in fan speed. Turned the P/U off and the fan continued on high speed.

Pulled the 40 amp fuse and the fan stopped.

Any ideas?
Thanks
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Monday, April 21st, 2008 AT 11:17 AM

5 Replies

Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Did it stay on all the time even with the key off? Doea it have automatic controls? If yes you may need to have it scanned for codes.
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Wednesday, April 23rd, 2008 AT 7:23 AM
Tiny
ROB3
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  • 2 POSTS
With the key off and ever tihng else, it continued to blow on Hi. Keys out of the ignition. Gone to help the wife with her shopping.
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Wednesday, April 23rd, 2008 AT 5:56 PM
Tiny
RHALL77
  • MECHANIC
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Un plug the blower motor resistor and see if it shuts off. May be a shorted resistor.
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Thursday, April 24th, 2008 AT 10:17 AM
Tiny
ROB3
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Where is the resistor located?
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Thursday, April 24th, 2008 AT 11:52 AM
Tiny
RHALL77
  • MECHANIC
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Down by the heater box on the passenger floor. It has 4 to 6 wires on it by the blower motor. See if the plug is burned or not.
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Thursday, April 24th, 2008 AT 11:54 AM

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