Blower Fan (in-cab) Blowing Fuses, 2001 Silverado 1500

Mattt · June 4, 2009

Problem I'm having is with the in cab blower fan. If I turn on the controls, it instantly blows the 30a fuse up in the engine compartment fuse box. I've checked a few things and I don't think it's the switch or the AC compressor because with the fan motor itself disconnected, the fuse does not blow. I've disassembled the AC/Heater box cover at the passengers feet, and I can see the bottom of the blower motor, but I can't figure out how to remove it. I also used a mirror to look down inside the case thru the open re-circ door and I can see the white squirrel cage blower piece. It doesn't appear to be broken.

I ran a search here, and found a few threads talking about a resistor failure, but that seems like it is more towards problems with fan speed. The problem I have is that the fuse blows with the fan plugged in and the switch turned on.

I might read a bit more on the resistor deal.

Is the blower fan removal a huge job? How does it come out?

bossier62guy · June 4, 2009

Problem I'm having is with the in cab blower fan. If I turn on the controls, it instantly blows the 30a fuse up in the engine compartment fuse box. I've checked a few things and I don't think it's the switch or the AC compressor because with the fan motor itself disconnected, the fuse does not blow. I've disassembled the AC/Heater box cover at the passengers feet, and I can see the bottom of the blower motor, but I can't figure out how to remove it. I also used a mirror to look down inside the case thru the open re-circ door and I can see the white squirrel cage blower piece. It doesn't appear to be broken.

I ran a search here, and found a few threads talking about a resistor failure, but that seems like it is more towards problems with fan speed. The problem I have is that the fuse blows with the fan plugged in and the switch turned on.

I might read a bit more on the resistor deal.

Is the blower fan removal a huge job? How does it come out?

Check the electrical connector that is running to your blower speed resistor since they have been known to overheat and melt. All of the voltage that runs your fan runs through that connector through your blower motor resistor and then finally to the blower itself.

Mattt · June 4, 2009

Where is that located? What am I looking for? Is it something down near the fan itself, or up near the switch?

bossier62guy · June 4, 2009

Where is that located? What am I looking for? Is it something down near the fan itself, or up near the switch?

It's near the blower motor itself....I remember seeing some pictures of it on here somewhere and am currently trying to find those for you....hang in there. If you can find the wiring leading to the blower motor you'll find it easily enough.

bossier62guy · June 4, 2009

Where is that located? What am I looking for? Is it something down near the fan itself, or up near the switch?

Try this link: http://www.fullsizechevy.com/forums/showth...+motor+resistor

Mattt · June 5, 2009

Awesome.....Thanks a million for the link and the advice. I took a look at the board up in the blower box, and it looks a bit cooked, but not as burnt as the one in the linked pics. Think I'm going to try this first. Again....Thanks for the advice and tech link.

bossier62guy · June 5, 2009

Awesome.....Thanks a million for the link and the advice. I took a look at the board up in the blower box, and it looks a bit cooked, but not as burnt as the one in the linked pics. Think I'm going to try this first. Again....Thanks for the advice and tech link.

You're quite welcome....let us know what it takes to get it fixed.