How do I know if my blower motor fuse is bad?
Symptoms of a bad heater blower motor resistor
- Fan does not work at all, so no air comes out of the vents.
- Fan only works on some speeds and not others.
- Fan only works on the highest speed.
- Fan runs all the time and can’t be controlled with the fan switch.
- You see smoke coming out of the vents.
Which fuse is for the blower motor?
Fuse Protection To protect the blower motor power circuit, a 20-, 25- or 30-amp fuse is usually located in the fuse panel under the dash. The rating of the fuse will depend on the vehicle application and how much power the blower motor requires at full speed.
Do blower motors have fuses?
The blower motor is powered by a fuse-like device called a relay. If your heater or air conditioner does not blow air through the vents, this could indicate that the blower motor fuse has probably blown. While replacement is easy, the exact location of your blower motor fuse may vary from vehicle to vehicle.
Can a blower motor cause a blown fuse?
If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current from a bad relay will blow the fuse and cut power in order to protect the system.
Where is the fuse located for the blower motor?
Under the instrument panel, look under the glove box. On the right side of the fender wall you will find another fuse box.
How long do blower motors last in a car?
For the most part, the heater blower motor on your car is supposed to last as long as the actual vehicle does. Due to the harsh conditions that this blower motor has to operate in, it will usually end up having repair issues. There are a variety of problems that the blower motor may have that will render it useless.
Why do blower motors fail?
Like other components in your HVAC system, the blower motor can wear down over time. Some of the reasons a blower motor might fail are overheating, and excessive moisture. Blower motors that are clogged with debris, or that become saturated with moisture can fail due to overworking or electrical shorts.
What would cause the blower to “blow” a fuse?
If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current from a bad relay will blow the fuse and cut power in order to protect the system.
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.
What are the symptoms of a bad blower motor relay?
One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow.
What are the parts of a blower motor?
Components of a Blower Motor. The components of a blower motor can vary from one application to another, but they typically consist of: a DC motor. a housing that can be bolted down. a fan (also known as a wheel or cage)