AC/Heater fan - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #1  
Old 07-15-2012, 02:37 PM
buckvan buckvan is offline
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2003 Chevy TrailBlazer LTZ
Majestic Red Metallic 4.2L I6 AWD
Join Date: Jul 2012
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AC/Heater fan

For some reason my fan won't kick in until I knock just below the glove compartment. It will continue to work until I shut the truck off. Any ideas?
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Old 07-15-2012, 03:24 PM
wellsc1 wellsc1 is offline
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2004 Chevy TrailBlazer LS
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Maybe a sticky motor

Sounds like the fan motor is playing hard to start. Inspect the motor. There's another thread that describes how to remove the fan motor. I suspect the motor has sticky bearing/bushings or there's something the fan blades (squirrel cage) rubbing it. Don't rule out bad connections or something obscure; but, go with the simple things first. I just replace my fan motor speed control resistor for a different problem I had.
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Old 07-15-2012, 04:21 PM
buckvan buckvan is offline
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Quote:
Originally Posted by wellsc1 View Post
Sounds like the fan motor is playing hard to start. Inspect the motor. There's another thread that describes how to remove the fan motor. I suspect the motor has sticky bearing/bushings or there's something the fan blades (squirrel cage) rubbing it. Don't rule out bad connections or something obscure; but, go with the simple things first. I just replace my fan motor speed control resistor for a different problem I had.
About 3 months ago I pulled a mouse out of the fan. So you think this could have damaged the bearings or something?
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Old 07-15-2012, 09:07 PM
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petevw petevw is offline
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I too had a mouse make a home in my blower which obviously stopped it (I doubt it could do any damage), but I also found that the connector that plugs onto the fan for power was not making good contact (could be why hitting the glove box gets it running (jars the connection??).

Once I checked it, and bent the connector apart slightly, it has run w/o problem since (1 1/2 yrs).
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Old 07-15-2012, 09:51 PM
buckvan buckvan is offline
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2003 Chevy TrailBlazer LTZ
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Quote:
Originally Posted by petevw View Post
I too had a mouse make a home in my blower which obviously stopped it (I doubt it could do any damage), but I also found that the connector that plugs onto the fan for power was not making good contact (could be why hitting the glove box gets it running (jars the connection??).

Once I checked it, and bent the connector apart slightly, it has run w/o problem since (1 1/2 yrs).
I will take it apart and see if the connection might be the problem. Thanks much my friend.
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