the sound comes from behind the glove compartment .. you can hear it from the outside and inside. its pretty loud. the car still heats nicely .. except my heater only turns on when its on the 4th and last level.

i was thinking since i dont have a passenger side splash guard under the fender.. something might have gotten into the unit .. possibility?? please help

 

I had the same problem. I had to replace the motor itself. Might be thse same with you, or it could be the fan. check it out. Nad youll want to get that slash guard on it too.

 

splash guard has nothing to do with it cuz the blower motor is in the passenger cabin. sometimes, debris gets in the motor causing noises but it sound like yours is on its way out if it only turns on on the highest setting. get the electrical checked out before you replace the whole blower cuz you may have to remove the whole dash to replace it.

 

i second that

 

if it only works on the high setting that mean the resistor went bad-i think thats what its called-it controls the settings 1,2,and 3. the high 4 setting doesnt run off of the resistor. its a dealer part and usually located under the passanger side dash. check that out first.part is probably about 30-40 dollars and easy to change