As more resistance is applied to the circuit the slower the interior fan motor will.
A resister block will adjust its total resistance as selected by the driver from the switch. It’s used to control the output speed of the blower motor. If you still don’t hear a loud car AC fan noise anymore, then you’ll know the debris was what caused that awful jet engine noise. The resister block used on many models is coupled with a control module. I would only use that in very cold conditions and not for too long. The highest speed is wide open, no resistor. You could get one out of a car with 3 or 4 settings and use that. They have a different resistor for each speed.
If you don’t hear anything, from there, put it on full blast. Modern cars (like 70s up) control the blower speed with a set of resistors.
After you reinsert your blower motor, with the key on, first test it at half speed. Check out free battery charging and engine diagnostic testing while you are in store. While it’s likely that any debris caught inside that you removed was causing the bad blower motor sound, you’ll want to test your blower motor to make sure. Order Lincoln Town Car A/C Heater Blower Motor online today. With the key on, turn your AC or heater on. Does the bad blower motor sound get worse if you crank your blower motor all the way up, like in the video?īlower motors are typically located under the glove box, but every vehicle is different.Īfter you locate and remove your blower motor, check for any debris that may be caught inside it. If you find a piece of trash wedged inside it like our mechanic did, gently remove it.