The heater blower in my car one day i went to use it was making alot of rattling noises i assumed was a leaf and turned it on full blast hoping to lose it. It continued, then went away, now it’s back. One day it was running full speed then i heard something odd. I herd the noisy motor/rattling then heard like wurrr bonk bonk bonk. Sounded like maybe the fan blade blew off, but it was still blowing fine. Still works fine, but is still loud. I gave a relative a ride today, he was like you need to clean that out, said he had cars that mice get in and this happens. He said was matter of time probably till didn’t work and i’d lose heat.
I looked at the blower today found 2 star screws, removed them i dug around found 3rd one they say these blowers have online. The one is in the back behind a huge gob of wires, and part of the flooring, or lower wall. I have no idea how to get that one out there seems to be plug near the wires, but i don’t want to unplug that not knowing if i can without messing up something. I have no idea how the die panel, etc would come out.
They said online these things are a pain. I was kind of planning to junk it in the next couple years because the body is severely rusting. Parts of under chassis are falling off, or breaking because parts are rusted so bad. Replacing a $~80 fan that still works but loud seems silly to me. My guess the motor is failing not junk in the fan.