Hey, guys. Jeep in question is the '93 below in my sig. Haven't noticed it before since I didn't need to use the heater very much until just recently and with it came what seems like a slight burning smell. It's most noticeable on the mid to high fan speed. All the way on low, I don't smell it....It almost smells the same as a heater with dust on it, but I'm not sure. Just wondering if I should be concerned....It takes a minute or two of running the fan for it to present itself.

 

Just a thought, but maybe something is in the plenum where the blower resistor is mounted, that smells when the resistor heats up when in low fan speed settings..(??)
Maybe removing the resistor & looking inside with a mirror for debris ?
Just some brain farts ..
Mine had a mouse nest in the fan plenum when I replaced the blower motor etc..

 

Take a look at the plug for the motor and resistor pack- they sometimes melt.

 

Radi, where would those be located? I haven't had much luck searching so far....

 

The fan speed switch connector may be toast.

You'll have to remove the A/C-Heat Control Panel to get at it for a look-see.

 

The switch works, it changes the fan speeds correctly. It's just when the fan is on the higher settings, it gives off an odd smell. Ever smell a space heater that's got dust on it? Very similar to that

EDIT: Oops, you said switch CONNECTOR....Missed that part. I'll check it out as soon as I get the chance.

 

Here's what to look for:

 

youch!

 

Could also be crap on the resistor element. Similiar to a heater thats stored in closet until needed.

 

Thats like a fire waiting for a place to happen...

 

Ooh, nice! Well, chalk another one up for the to-do list....I remember last time I had the dash apart that connector LOOKED good from what I could see, but I'll definitely check it again.

 

Check for power there on all settings while in there. Even a good looking connection can be bad.

 

I know its a bit late but a while back I noticed a burning smell like you. Turns out my fan control switch was toast as well as the plug like the picture above. Now it doesn's work at all.

 

Bundle up!

 

Way ahead of you