replace it
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.
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
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.
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.
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.
Simply put... It's because the failure mode of the blower control module is electric power on! (even with ignition off)... Disconnect the battery, or better... find and remove the 30 amp blower fuse. Remove and replace module with serviceable unit. Reinstall fuse or reconnect battery. Good luck! Note: If the blower is noisy at high speed or in cold temperatures, (if it vibrates or rumbles and squeals), now is the time to change it!
Good battery,slow cranking speed ,noisy,