Diyvehiclerepair
- Why does my heater fan only work on high?
- Can a blower motor resistor work intermittently?
- What does a heater fan resistor do?
Why does my heater fan only work on high?
When a resistor fails, the fan will often run only at higher speeds or the highest speed, no matter what fan speed is selected. ... If little air is coming through the vents (hot or cold), then it could be because the blower motor for the fan or a switch or resistor that controls fan speed isn't working.
Can a blower motor resistor work intermittently?
Reduced airflow is when the blower motor is trying to move air through the vents but the resistor isn't sending enough power to move the air with much pressure. ... Depending on how much resistor is still functioning, the reduced airflow could be an intermittent problem.
What does a heater fan resistor do?
The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. It is responsible for controlling the blower motor's fan speed.
