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Q: When i turn the air conditioner on i see thick gray smoke coming out of the dash on 1994 GMC Jimmy

The smoke comes from where the air conditioner buttons are, and the smell is like burning rubber. the small heater was replaced about a year ago and i didn't have any problems for a year, now i can't touch the air button because as soon as i do that it looks like there's a fire under the dash. Thanks in advance for your help.

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sounds like a resister for the heater replace resister and heater motor. they have to be replaced together because if the resister goes it usually take out the blower motor. also don't use it in the meantime, and check the wiring while your in their
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