Hello guys, i have an 01 2500 SLT quad cab, now that the cold months are setting in i am using the fan to defrost windows and now the only setting the fan works on is full, and nothing from 1-3 settings..

sure i can sort this out if i can get a few pointers from people who have had the same problem...? blower motor resistor, blower controller??

thanks alot guys

 

Most likely a bad blower motor resistor.

 

+1. There was a posting about the same issue within the last week. You may search for it. It included photos and location of resistor.