Blower fan running will not shut off.

Tiny
JAMES BERNDT
  • MEMBER
  • 2006 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 117,376 MILES
When I shut off my truck the heater fan continues to run I have to pull the fuse to get it to shut off
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Thursday, November 20th, 2014 AT 1:47 PM

5 Replies

Tiny
DRCRANKNWRENCH
  • EXPERT
Hello,

It sounds like you have a blower motor relay that is stuck if the system is manual and a blower motor speed control for the automatic system. Here are the locations for each and the blower motor wiring diagrams for both systems.

Check out the diagrams (Below)

Please let us know what happens.

Cheers
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Thursday, November 20th, 2014 AT 2:16 PM
Tiny
JAMES BERNDT
  • MEMBER
Yep you where right it was the speed controller I have an automatic system. Thank you so much!
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Thursday, November 20th, 2014 AT 2:44 PM
Tiny
DRCRANKNWRENCH
  • EXPERT
Good to hear, please use 2CarPros anytime we are here to help.

Cheers
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Thursday, November 20th, 2014 AT 3:08 PM
Tiny
BOBRADLEY
  • MEMBER
  • 2006 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 95,000 MILES
Electrical problem
2006 Chevy Silverado V8 Four Wheel Drive Automatic 95000 miles

My blower motor stays running on high, controls have no effect, runs even with key removed. Only way I can shut it off is to remove the relay, I've already tried other relays, no difference. I'm not sure if this is relative, but I just had it oiled before this problem started. Any advice would be greatly appreciated, thanks.
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Thursday, March 22nd, 2018 AT 11:59 AM (Merged)
Tiny
BRIAN 1
  • MEMBER
Try this, Some customers may comment that the blower motor is inoperative or continues to run after the vehicle has been shut off.

Cause
These conditions may be caused by a blower motor control module failure. This failure may occur when the vehicle is operated in ambient temperature conditions of -23 C (-10 F) or below.

Correction
Important: Replace the blower motor control module if the vehicle experienced a blower motor control module failure in extremely cold ambient temperature conditions.

Technicians are to replace the blower motor control module, also called the Linear Power Module (LPM), with the P/N listed below. Refer to either the Blower Motor Control Processor Replacement or Blower Motor Processor Replacement-Auxiliary procedures in SI. After replacement of the blower motor control module, the customer may notice a slightly higher than expected blower motor speed at any of the blower speed settings.

Parts Information
Part Number
Description
Qty

89018849
Module Assembly, Auxiliary Blower Motor Control (Rear System on Escalade ESV, Suburban, Yukon XL)
1

89018964
Module, HTR & BLO & A/C CONT (Front system only vehicles - Except H2)
1

89023355
Module Assembly, Blower Motor Control (H2 Models)
1

89024926
Module Assembly, Auxiliary Heater & A/C Control (Rear System on Escalade, Yukon, Tahoe)
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Thursday, March 22nd, 2018 AT 11:59 AM (Merged)

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