Smoke from AC vents on Recirc

[callie454]

OK, manual dual zone hvac in truck. I had the fan on level 5, the panel vents selected, ac on, and recirc on. Under acceleration/load, smoke came puffing out the dash vents, more noticably from the vent just right of the radio. Smelled like a Lionel train set - electrical smoke. I can replicate it in the driveway, by setting everything as stated above, and pushing on the throttle. No smoke from vents when recirc is turned off.... Please help.

 

[Max Attitude]

Same thing happened in my truck recently. This also happened in our '04 work truck. I replaced electric panel (a relay maybe?) in the work truck because the fan would only work on the highest setting. It was only a $25 part from the dealer. I'm not sure if the two things are related or not. Mine also gave off a musty electrical smell. Let me know if you figure it out.

 

[callie454]

I got it resolved. It was the blower resistor...NAPA part # BR 474. Turns out it's a pretty common failure. Remove the black cover (at your toes as a passenger) to access the resistor. The resistor has a 1 red and 1 black 10 ga wire connector. I was lucky, 'cause I only needed to replace the resistor, some guys cook the harness connector as well. Hope this helps.

 

[Max Attitude]

yup, same thing as our work truck had. How much was the Napa part?

 

[callie454]

IIRC, it was $54.00. It was the exact same part/manufacturer as the original. I guess I can look forward to replacing it again in another 60k miles. :mad2: