Quick question for the forum, when I go to use the blower for a/c or heat, I can only use speeds 2,3,4,5. 1 does not work, so the car gets really cold or really hot. Would the fault be with the whole hvac unit or is there a resistor that can be replaced? Thanks in advance

 

Maybe your 1 setting is suppose to be that low.

 

no, because it has off,1,2,3,4,5. It worked a few years ago, but then it just stopped and ive just left it.