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What can a bad blower motor resistor cause?
The most common symptom of a failed blower motor resistor is when the heater fan only runs at the highest speed setting (4 or 5) and doesn’t work at low speeds. In some cars, a failed blower motor resistor can cause a heater fan to stop working completely.
Does a bad blower motor smell?
Electrical burning smells can be highly alarming. This odor could indicate an overheated blower motor. Blower motors commonly overheat due to clogged air filters. For these reasons, if you notice this smell and your air filter is fine, turn off your heater and call an HVAC technician pronto.
Why is my blower motor making noise in my car?
Loud noises you hear when your car’s heater or air conditioner are on typically indicate a blower motor issue. The good news is that a blower motor problem like this can be the result of something as simple to fix as debris or trash that got caught in it.
What are the symptoms of a bad blower motor resistor?
A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed.
Why is my blower motor stuck on one speed?
Blower motor stuck on one speed A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed.
Where does the power go in a blower motor?
To run on the slowest speed, the power runs through all three resistors. For each higher speed, power flows through one less resistor. Some car makers run blower motor power through the fan speed switch first, then through the blower motor resistor and then to the blower motor and ground.
Where is the blower motor resistor on a Honda?
It’s located inside the dash, often on the opposite side of the steering wheel or inside the engine compartment on the firewall. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor. How the speed of the blower motor is controlled. See also: Honda blower motor control module.