Heater blower resistor must be regularly maintained so that it runs efficiently enough.

The heater blower motor resistor works efficiently and at high speed if the resistor block is of good quality and if not you can easily replace it because the resistor block can be bad or corroded .People whose heater blower motor resistor has a bad resistor lock or a bad blower motor relay they also don't work at all and you need to check the fuse and replace it if necessary. Plus also inspect the resistor block and replace it too if it is a bad one. But if nothing is wrong with these two then you need to replace the Blower motor.

Plus when the heater blower motor resistor contacts are burned or pitted they seem to produce a growling sound stop altogether so at times you need to replace all the parts totally to increase its efficiency. At times it is also seen that the heater blower motor resistor continues to run even after the key is removed from the ignition then this occurs because the contacts are weakened then the closed position and refuse to cut the power supply.

The heater blower motor resistor is actually an electronic device which has three or more progressive resistors that allow it to operate at a slower speed plus it functions in climate control of the instruments so that it doesn't get blown off due to over heating.

Heater blower motor resistor is available online from the manufacturers that serve a variety of brands and you can choose the one that fits your replacement best. The heater blower motor is located behind the dashboard and it can be controlled by buttons or dials on the dashboard. The heater blower motor works in forcing air through the radiator behind the dashboard and provides heat for the passengers. And thus alternatively the blower motor also blows air into the air conditioning evaporator to provide cool air to the passenger compartment. The heater blower motor operates at a high speed only when the heater control resistor unit fails. And to access the heater blower motor you need to disassemble the dashboard.

Most heater blower motor gets damage due to fluid leaking from heater core or evaporator and after getting this problem repaired the heater motor should run at a normal speed in all modes that is defrost and heat .Plus the new one doesn't produce any sound and vibration and works noiselessly.

You can get all the details of the heater blower motor form the online sites that are ready share information on where to buy the best and how to get it installed. Plus maintaining and cleaning the heater blower motor regularly helps to increase their life.