A couple months ago, I turned my car on, and the blower motor, which is usually on at SOME speed, was giving me nothing. Fiddled with the knob for a couple seconds, and nothing. Drove about 500m, and noticed smoke coming from the vents. Drove back home immediately and parked.
Since then, the car has been drivable, I’ve just left the adjustment knob in the OFF position. Yep, no AC this summer. Awesome. Anyway, with cooler temperatures approaching, I will definitely need some defog/defrost action if I plan to continue driving.
Fast forward to yesterday. Bought a new blower motor. Ripped out the old, shoved in the new. Nothing. OF COURSE… when the old motor shorted (?), it would have blown the fuse! Sure enough, 30 A fuse in the box under the hood. Scorched. Back to the store for a new fuse! New fuse in place, let’s try to hook that new blower motor up again… HOLY CROW. As soon as I connected it, it turned on full blast! In my hand! The key wasn’t even in the ignition! Scared me half to death.
As a non-car guy, I only know what I have already Googled. I understand that there is a motor and a resistor module, and a fuse and at least four relays in the box under the hood labeled “fan control.” At least one of these has failed or is failing.
Do fuses smoke when they burn out? Or would the smoke have been from a short? Is the motor fried? Did the resistor go bad?
Everything as is, the old motor is always off and the new motor is always on. So this would lead me to believe that the old motor burned out, yes? But WHY does the new one not work propertly? Is the resistor bad, too? I’ve read that a bad resistor can lead to a fun being stuck on a certain speed (ie. high). Would that apply even when the car is off? Or is it more likely that one of the relays is stuck in the on position? But if THAT were true, why can’t I adjust the speed?
I am so confused and lost!! Any tips??
Thanks for reading,