What kind of problems can a blower motor have?
Blower motor problems can cause many driver complaints. Anything from no air circulation to annoying or noisy operation. At the bottom of this page is a video that’s very popular. It reviews best practices for diagnosing common electrical problems.
How to troubleshoot your furnace blower motor fan?
A third quick and simple troubleshooting step for your furnace blower motor is to make sure the filters and vents are clean and free of dust and debris. To do this, go to each of your home vents and ensure they are open and clear. Next check the cold air return filter for dirt or dust build up.
How is the speed of the blower motor controlled?
The electronic module that controls the speed of the blower motor is called a blower motor control module. In some cars, the blower motor has only 4 or 5 fixed speeds. In this case, the speed of the blower motor is controlled by a blower motor resistor.
How to check if the blower motor belt is the issue?
To check if the blower motor belt is the issue, first ensure that the furnace door is fully closed properly, as the furnace will not work if the door is open due to a switch on the inside of the furnace door. Locate and turn off the main circuit breaker or safety switch for the furnace, to ensure there is no power going to it.
What are the symptoms of blower motor failure?
- Lack of air from the vehicle’s vents
- Stuck on specific settings
- Stuck at one speed
Why is my furnace blower motor not working?
Another common problem with furnace blower motors not working is caused by the “three D’s”; dust, dirt and debris. These three alone can cause overheating of the motor, which in turn causes the windings and bearings to burn up quicker. Dirt, dust and debris can cause the blower motor to overheat and seize up.
Can blower motor be lubricated?
Most furnace blower motors come equipped with a self-oiling system, but if yours does not have this then you will have to manually lubricate it. Locate the oil ports in the motor. This is where the oil has to be applied. Buy non-detergent oil that is exclusively made for the furnace blower motor.
What is the function of blower motors?
What Does a Blower Motor Resistor Do? Definition. A blower motor resistor, typically located beneath the passenger side dashboard, contains three resistors, or sets of terminals designed to generate voltage in proportion to electrical current. Function. Blower motor resistors contain controls that determine air settings. Repair.