Question about 2004 Chevrolet Monte Carlo

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Blower motor runs all the time key on or off.

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  • Anonymous Oct 07, 2008

    I have an 04 MC SS and i turned on the heat one day and it never turned off even with the key out. I have to unpplug the blower motor fuse in order to turn it off.

  • 04chevymc Oct 07, 2008

    I have the same problem with my 04MC SS. I turned heat on one day and it stayed on with the key out! I have to unplug the blower motor fuse in order to get it out.

  • ryry1988 Dec 06, 2008

    i took my head off the car and i heater was working fine when we got it all back togeather the hearter blower now isnt working.. why would this be..

  • Rustic_Rides Jan 14, 2009

    I have a 1994 S-10 Blazer that has had blower motor isues. TO say the least.
    I have replaced with new or good working used Blower new , Switch NEW X3 , Resistor New, Relay New X2, What else could couse it to act weird??? some times it stays on some times it won't work, It has ben on high working fine for the last 4+ weeks till last night it stayed on and killed the battery. it is now -4 out side & I need to get it figured out. Please HELP

  • Anonymous Jan 22, 2009

    my 2005 silverado heater fan will not run sometime whatever the settings.

    other times the fan will not shut off evan with the key off,and the settings off.The drain kills the battery.the problems are not always present and are very frusterating.

  • Anonymous Feb 05, 2009

    A friend of mine has a 2004 Impala that cant get his blower to turn off, when the keys are out of the ignition. The radio will stay on as well.

    I suspect an issue with 1 or more relays, but dont know for sure. Wish someone had a solution for this. I need a schematic to locate all the relays.

  • Jeremy Elenbaas
    Jeremy Elenbaas May 11, 2010

    What year is the car?


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  • 421 Answers

Your blower motor resistor is shorted and needs to be replaced it is located on the blower box and has 5 or 6 wires going to it there should be two small 7 mm bolts holding it down, you can pull the blower motor relay to shut it off for now untill you get a replacment resistor good luck and please rate -jeff

Posted on Sep 05, 2008

  • Lakewaydrive Dec 04, 2010

    Sometimes it is NOT the resistor that causes this malfunction. Someone needs to post what happens if it is NOT the resitor... then where do you go?

  • Jason Blundo Nov 02, 2012

    I'm on my second resistor. Replaced the motor. Worked fine for a week. Pulled into work today and sure enough motor went full blast and now it's stuck on.


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I had just replace Power Module by the Dearler garage I don't know how do you call it and I'd paied a lot $525 for my vw. Touareg 2004 v6 3.2L .You can see what is it look like. It's working fine but I don't know for how long.blower motor runs all the - f9097819-69e3-44bd-80a2-c6b396808f7b.jpg 974116c2-4db1-4f9a-8176-767b427159fd.jpg

Posted on Sep 12, 2014

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Heater fan runs all the time with key out 04 impala

Posted on Mar 20, 2009

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SOURCE: blower motor runs even when vehicle is turned off

you need to check the blower motor resistor.

Posted on Jan 21, 2010

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Check this link for more help.

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You have a bad blower motor relay, when the relay goes bad. It can freeze in the on position keeping the contact closed to run your blower motor. Inspect the blower motor relay and wire harness for any short due to burnt wire, this is a common issue with that year of Silverado's
Thank you for using fixya and good luck.

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2 Answers


at blower motor connection, disconnect wires and run a 12v line to the positive side of motor and ground the other side if need be. if motor runs then you have a fuse or a wire problem. if it does not run. then blower motor is bad.

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