PatrickJeep

So my 99 jeep's blower motor squeals like crazy when i turn the a/c fan when its cold outside. as my car gets warmer, it goes away. Im pretty sure its the blower motor because the noise is coming from the passenger side. Now how would replace the blower motor, or would i just have to some how lubricate it? Where is it located at? Would sending it to get fixed be easier?

austinjoe13

Mine does that too and so did my stepdad's silverado. He replaced the blower because there were some ker-chunk sound scoming from it too. I think as long as its just a whining sound you're ok.
I don't know too much about this so hopefully someone more knowledgable will chime in.

the_big_h

I've had lots of troubles with squealing heater blower motors, in various vehicles. Usually fixed by oiling them. Yeah, I know, they have "oillite" bushings, that aren't supposed to need oiling, but once I bought a brand new one, and it started squealing in 6 months. Since then, I oil them. If the bushings are worn out so I need a new one, I oil it before I install it.
The shaft end is easy enough, the other one is usually accessible through the vent hole. If not, I've drilled or filed a hole in the end bump, and oiled it through there. I just use ordinary engine oil. Oil is an electrical insulator, I get as much on the bushing as I can, without having it run all over. Avoid getting it on the commutator or brushes, I'm sure that would be bad for it.
One thing you have to watch for, with blower motors. Even on minimum speed setting, the fan is always running. If the bearings (bushings) get tight, then the fan may not actually turn at minimum speed setting. Then the speed control resistor overheats (because there is no air flowing past it to cool it), and burns out. If you ever have a burnt speed control resistor, check the blower motor too, make sure it spins freely.

Works for me, YMMV.

Firestorm500

Replace the blower motor with a quality new part.

Before it burns up.

PatrickJeep

thanks everyone ill try to oil it and see if it works