The resistor limits electrical current so that the blower operates at the correct speed. If the resistor fails, generally, the blower will only work on select speed settings. There are also some instances where the blower motor may not work at all.
If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. The heating and air conditioning systems may still function at one speed, however the resistor will have to be replaced in order for full functionality to be restored.
Beside this, Can you drive without a blower motor resistor?
except blower motor resistors don’t “wear out”; they stop working altogether, suddenly, when the resistance wire inside burns through. Even then, it’s safe to drive the car provided that it has no exhaust leaks which might permit carbon monoxide or oxides of nitrogen to enter the passenger compartment.
Likewise, What are the signs of a bad blower motor resistor?
– No Air. …
– High speeds only. …
– Low speed only. …
– Fan won’t turn off. …
– Blower motor works on some settings but not others. …
– Smoking vents. …
– Burning smell.
Also, How do you check a blower motor resistor?
– Start by looking for the blower fan resistor. …
– Inspect the resistor visually. …
– Check the electric resistance of each of the resistor’s terminals with a multimeter. …
– If any of the points show infinite resistance, the blower motor resistor has failed.
How do you test a blower motor resistor with a multimeter?
How do you test a blower motor resistor with a multimeter? Place one lead of the Ohmmeter on terminal 1 of the resistor. Place the other lead on terminal 2 and check against specifications. If this circuit is open, showing infinity on the Ohmmeter, the blower resistor must be replaced.
22 Related Question Answers Found
What happens when blower motor resistor goes bad?
If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. The heating and air conditioning systems may still function at one speed, however the resistor will have to be replaced in order for full functionality to be restored.
What does the AC blower resistor do?
Blower resistors are resistors which are used to control the fan speed of automotive blowers. The fan speed can be changed either by switching the blower resistor resistance mechanically, using a rotating lever, or electronically by the air conditioning system.
How much does it cost to replace a blower motor resistor?
It’s time for a blower motor resistor repair. So, how much will you be shelling out to get this part fixed? According to the latest data we received, the average blow motor resistor replacement cost lies between $115 and $141. The final costs will depend on the vehicle that you are driving.
How do you troubleshoot a blower motor resistor?
– Start by looking for the blower fan resistor. …
– Inspect the resistor visually. …
– Check the electric resistance of each of the resistor’s terminals with a multimeter. …
– If any of the points show infinite resistance, the blower motor resistor has failed.
How much does it cost to replace blower resistor?
It’s time for a blower motor resistor repair. So, how much will you be shelling out to get this part fixed? According to the latest data we received, the average blow motor resistor replacement cost lies between $115 and $141. The final costs will depend on the vehicle that you are driving.
How do I know if my blower motor resistor is bad?
– No Air. …
– High speeds only. …
– Low speed only. …
– Fan won’t turn off. …
– Blower motor works on some settings but not others. …
– Smoking vents. …
– Burning smell.
How do you fix a blower motor resistor?
How do you test a blower motor with a multimeter?
Using a multimeter set on the Ohm scale, use the positive lead and test the black wire. To check the purple wire for current, use your ignition key and turn it to the run setting, turn the heater power to full power and set the multimeter to DC power. If your meter reads “no current” the motor is no good.
What is the difference between a blower motor and a blower motor resistor?
The motor that runs the fan in the heating and air conditioning system in a car is called a blower motor. … A blower motor resistor is a simple electric resistor. It’s used in cars where the blower motor has only 4 or 5 fixed speeds, as on the left side in this diagram. See the photo of a Ford blower motor resistor.
What causes a blower motor resistor to go out?
In most cases, a blower motor resistor fails due to corrosion or overheating. Sometimes, the mechanical resistance to the motor rotation causes an excessive electric current that can overheat and prematurely damage the blower motor resistor.
Is my blower motor or resistor bad?
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.
How long does it take to replace a blower motor resistor?
about 45 minutes
Last Updated: 12 days ago – Co-authors : 14 – Users : 4
