Hi everyone, I have an ‘02 Monte Carlo SS. And I’ve been having issues with my fan speed. My heat and air only work on full blast. Yesterday I replaced my blower motor brand new and in the past I’ve replaced my HVAC unit, though it did come from a junk yard.. so not sure if I should try replacing the unit again or maybe it could be fuses/relays? Any help or advice would be great, as I’m out of ideas..

 

Did you replace the blower motor resistor? These are usually the cause of fan speed problems.

 

i replaced the blower motor resistor brand new yesterday and the HVAC unit in the past. The HVAC unit came from the junk yard though, so I’m not sure if it’s that or maybe some fuses?