2008 Chevy Colorado blower motor only works intermittently or not at all

Dale Farr

• 78 Answers
• Posted on Mar 17, 2009

SOURCE: blower only works on 4,123 not working.

Hi There;
You say your heater fan only works on high.

This issue can be repaired by replacing what is called the "blower motor resistor". The electrical current flows through this unit in all positions except #4.
If you look under the dash on the passenger side with the heater fan on #4 you will hear the blower motor running. Just slightly toward the drivers side of the blower motor & closer to the firewall you will see a four wire connector. this is attached to the "blower motor resistor". If you get a replacement one & examine it you will see two screw holes where you will need to remove the 9/32nds screws from the one in your truck to remove the fauly one & install your new on. This part is relitivly inexpensive & it is not worth trying to locate a used one.
Please let me know if you need more info on this
Farrout!

SOURCE: Blower on my 2004 Chev Colorado only works on high setting #4.

You need a resistor pack, which is likely located in the air box, near the blower motor.

SOURCE: The fan/blower only works on the high setting.

It probably is the fan switch itself. They are around $30. for a new one. You can take it out and check to see if you have power to all the settings with a ohm meter or test light. They are not real hard to take out.

SOURCE: 2004 colorado blower motor only works on 4

the blower motor resistor and connector located under the pass. side of the dash need replaced the connector melts and burns the resistor an updated part is available from the dealer I have replaced many of them

SOURCE: 2005 Chevy colorado blower motor only work on

The blower only works on High because something called a "blower motor resister" has gone bad. The resister works by resisting/absorbing the power to the blower motor on the lower speeds, At high speed it lets all the power go through. The part is about $20.00 for a Jeep (common problem). Getting at it and knowing where it is I can't help. But with that knowledge, you should not get screwed by the repair shop.