How to tell if a blower motor relay is bad?
How to tell if a blower motor relay is bad? Symptoms of a bad heater blower motor resistorFan does not work at all, so no air comes out of the vents.Fan only works on some speeds and not others.Fan only works on the highest speed.Fan runs all the time and can't be controlled with the fan switch.You see smoke coming out of the vents. Can a bad blower motor cause fuse to blow? If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse...