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Why does my blower motor resistor keep blowing?
Trent, one of the biggest reasons for blower motor resistors to have shorten life is actually because of faulty blower motor drawing too many amps, some times melting wires/plugs, heating up resistors shortening their life.
Can you bypass a blower motor resistor?
In the highest speed state, the blower resistor is bypassed completely and the fan is connected directly to the car’s battery, which allows maximum current through the motor. Power to the blower motor is fed through the blower motor resistor, so if it fails or has any issues power can be cut off to the motor.
Are blower motor resistors supposed to get hot?
This would be normal. Don’t know for sure about the specifics, but resistors are designed to get at least warm, if not hot. If it gets hot to failure, then you got other problems, like a short somewhere including in the motor.
How do I know if my heater relay is bad?
If you have a faulty blower motor, you may experience low airflow from the vents, even when the fan is on high. There will be no air coming from the vents if your fan isn’t working due to a bad blower motor resistor.
What are the symptoms of a bad blower motor resistor?
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. Blower motor does not work on certain settings. No air from the vehicle’s vents.
Why does the blower motor resistor keep blowing?
The blower motor is probably worn out and drawing too much current causing the resistors to blow. Check that and the plug up to the blower and resistor for any melted wires.
What is a blower motor resistance?
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. These resistors allow the blower motor to function at lower speeds.