Heater Fan only 2 speeds

[llerrad]

Heater fan has only 2 speed, lower speeds don't work is this a big problem with the Cav. is there a recall for this problem?? Where is the board to change and fix this.

[5150cavy]

It sounds like the blower motor resistor craped out. What year cav is it? I work for a chevy dealer in service so i can tell you where it's at and how to check it out.

[-Jayson-]

i had that happen on my old cavy, 95. It was either off or full blast.

[llerrad]

Found the problem on earlier post, the resistor as noted by 5150cavy was gone. Changed it for new one just by the blower motor passenger area under dash, now works all speeds. This seems to be a big common problem on Cav's.

[5150cavy]

just about any gm car this is a common problem. especially on newer malibu's (not sure on 03) i have replaced a couple on them.

[ago]

I have a similar problem on my 2000 Z24. There are 4 fan speeds and the fan motor works only at speed 3 and 4.

Can you help me identify what this resistor looks like, and where it is located with respect to the fan motor underneath passenger front dash area ?

What does this resistor cost, and can it only be found at a dealer ?

Thanks,

ago

[Mangoamerican]

hahaha, I SERIOUSLY thought that my fan motor only worked in the last two positions

[Skycity_BMW]

Originally Posted by ago

I have a similar problem on my 2000 Z24. There are 4 fan speeds and the fan motor works only at speed 3 and 4.

Can you help me identify what this resistor looks like, and where it is located with respect to the fan motor underneath passenger front dash area ?

What does this resistor cost, and can it only be found at a dealer ?

Thanks,

ago

yeah . . mine too . . .

Please help ! ! !

[noshun]

This is such a common problem that if a vehicle goes into a GM dealer with this fault on warranty, GM will not pay the dealer for the Diag and tell them to replace the resistor box first thing. They are a bit gay really not very well designed and it happens in lots of different models but mainly cavs because people tend to leave them switched on all the time due to having to turn the position switch to switch it off! easy job except for it's position right againt the firewall behine the dash and the motor assembly!! Lay upside down on the seat for best view but blodd rushes to your head!! Good ol' GM!!!!!

[4dr92cavi4cyl]

Yeah, while changing my heatercore I nearly passed out and felt sick for hours after due to the bloodrush, whoo! It felt like someone was rocking the car!

[Langning]

Originally Posted by ago

I have a similar problem on my 2000 Z24. There are 4 fan speeds and the fan motor works only at speed 3 and 4.

Can you help me identify what this resistor looks like, and where it is located with respect to the fan motor underneath passenger front dash area ?

What does this resistor cost, and can it only be found at a dealer ?

Thanks,

ago

It is a waffle (circuit-board) the size of 3x4 inch with a BIG socket on one end. It is behind the blower motor under the passenger dash/glove box. If you remove the passenger-side bottom panel/cover (where your toes are), you won't miss it.

Autozone.com sells for $15. When I replaced mine, dealer didn't return my call on the cost but do expect them to be twice or 3 times the $15 amount.

[ago]

Thanks for the info folks. I'll give it a whirl, and will report back !

ago

[Skycity_BMW]

Me too . .

[ago]

Can't find the part on autozone.com

Cav Z24 2000 2.4L

ago

[noshun]

Originally Posted by ago

Can't find the part on autozone.com

Cav Z24 2000 2.4L

ago

As far as I'm aware this is a main dealer only part but hey that may just be up here in Canada. Try calling Autozone etc as they will be able to tell you straight off. I believe they call it the 'heater fan speed resistor unit'