replace it
Common reasons for a noisy furnace include loose components, clogged filters, or a malfunctioning blower motor. To fix it, tighten any loose parts, replace clogged filters, or have a professional inspect and repair the blower motor.
The following can cause this problem.................. 1. Bad blower motor. 2. Bad blower motor wheel. 3. Trash in the blower housing...
They get noisy, squeal and vibrate. Also if you keep burning out the blower motor resistor, that is a sign the blower motor is on its way out.
Your ac/heater blower motor may be going out, located below the glove box compartment.See "Related Questions" below for more about this easy do-it-yourself repair.
If the blower motor in your Chevy Silverado is noisy and no air is coming through the vents, it could indicate a few issues. First, check for any obstructions in the air intake or the cabin filter, as these can block airflow. If those are clear, the blower motor itself may be failing and could need replacement. Additionally, inspect the wiring and fuses related to the blower motor for any damage or malfunctions.
Behind the glove box inside the car. Small space to work but takes about 1/2 hour to replace. It's an easy do-it-yourself for about $50. Auto repair shops will charge $150-$300.
its the motor
-yes-if it work on hi only, check blower resistor-did you check the fuses-hit the blower with a hammer and see it that gets it going. if so, replace-has the blower been noisy lately? if so, replace-what kind of car is this? edsel? corvair? skyline?
remove the motor, some times its a buildup of leaves or debris stuck in the (squirrel cage fan blade) if no debris motor is old and bearing is worn you can run the blower while it it out of heater box but hold on with 2 hands and have someone turn switch you dont want to break plastic fan blade cage by bumping into dashboard at 600 rpm
Seafoam Motor Treatment.
You didn't say what type of motor. If an electric motor it could be the shaft bearing(s) are worn.
Noisy operation of a motor is usually caused by the motor's bearings. Use an instrument that can check the temperature of the bearings. If they are hotter than the surrounding temperature of the motor's frame then change them out for new ones. New bearings should quiet the motor.