How does a fan blower motor-resistor work?
How does a fan blower motor-resistor work?
Fan current passes through the resistor that is always wired in series with the fan, effectively dropping the voltage the fan see’s, whenever the fan gets power from the heater relay it should turn in at least low, but yours does not, this makes the resistor suspect.
Where are the fuses on a blower motor?
Check fuses 10 & 11 in the underdash fusebox. If those are OK than backprobe the blower motor connector and check for power on terminal 1. Check terminal 2 for a variable voltage, this should be 12v with the fan control knob on off and 5v or full ground on full.
Can a faulty blower resistor cause no air to flow?
Since the blower resistor is directly responsible to transfer the power from battery to the blower itself, a symptom of the faulty blower motor resistor is that no air flows from the car’s vent.
What should the voltage be on a blower motor?
If those are OK than backprobe the blower motor connector and check for power on terminal 1. Check terminal 2 for a variable voltage, this should be 12v with the fan control knob on off and 5v or full ground on full. If that checks out replace the blower motor.
Where is the blower fan located?
The blower fan is located inside a horizontal air conditioning unit in many home air conditioning systems, especially when the air handler is located in an attic or crawl area. The location of a blower fan in vertical “up flow” or “down flow” heating and cooling systems is illustrated in additional sketches and photographs below.
Where exactly is the blower motor resistor?
Usually it’s located in the dashboard on the opposite side of the steering wheel. You can’t see it because it’s inside the vehicle, but that’s where it is located. The blower motor resistor is the part of the blower motor that controls the speed.
Where is the blower motor resister?
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.
Where is the blower motor fuse and relay located?
The blower relay is located near the front of the fuse block and is labeled “Blower.”. Inspect the center of the relay. If the metal rod inside is broken, the relay will need to be replaced.
