When this happens its most likely the blower motor resister that is bad.......
You have a bad blower motor resister.........
Behind the glove box.
It's close to the blower motor.
If the fan only blows on high in the Liberty, check the blower resister. The resister circuit is the most likely cause.
When you beat the blower motor, you are probably shaking the blower resister. The resister is what controls the blower speeds and is probably bad or loose.
location of resister for blower motor on 1997 s 10 blazer
Remove the HVAC rear module auxiliary assembly.Disconnect the electrical connectors from the rear blower resister auxiliary.Remove the air outlet duct from the rear blower motor controller auxiliary.Remove the screws from the blower motor rear resister auxiliary.Remove the rear blower motor resister auxiliary.Replace the resister and install new thermal gasket.................
Blower motor resisters are generally mounted nearby the blower motor for cooling purposes.
As for why it blows only on the high speed you most likely will have a bad blower resister and for the noise, it could be a bad blower motor, bad blower wheel or trash that is stuck in the blower wheel or housing.......
The resister for the 2001 prism blower motor drops voltage to the blower motor. This is how the blower motor runs at a lower speed.
Well, In the 2002, the blower motor resister is behind the glove copartment. You might want to check there.