Well, i do have rpoblems with my blower motor (Code31). One day it just quit working and I cant find the problem. I have it hooked up to a switch so i can just flip it when i want AC or heat. I dont get it about code 42 though...check coolant pump? I must be missing something, i thought the only coolant pump was inside the engine bay! As far as the blower motor goes, i have traced it to a bad wire somewhere. The blower works, the blower speed module works (changed it), but its not getting any signal. I changed the electronic control unit, but i cant seem to be getting the signal out of the control unit to the blower speed module. Any help on that is greatly appreciated.