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 do I know if my blower motor resistor is bad?
- Fan does not work at all, so no air comes out of the vents.
- Fan only works on some speeds and not others.
- Fan only works on the highest speed.
- Fan runs all the time and can’t be controlled with the fan switch.
- You see smoke coming out of the vents.
How do you change the blower motor resistor?
- Remove the negative battery terminal. …
- Locate the blower motor resistor on the passenger side under the dash board. …
- Disconnect the electrical connector to the blower motor resistor.
- Remove the screws or bolts to the blower motor resistor and remove the resistor.
Can you repair a blower motor resistor?
The resistor module is easy and inexpensive to replace. It’s then typically installed in the ductwork, near the car blower—either under the dash or under the hood. (Refer to a service manual to locate yours.) Purchase a new resistor module at the auto parts store (usually less than $25).
How much does it cost to fix a blower motor resistor?
The average cost for a Blower Motor Resistor Replacement is
between $108 and $137
but can vary from car to car.
What happens when blower 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 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.
How long does it take to replace a blower motor resistor?
takes
about 45 minutes
.
How do I test a blower motor resistor?
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. Move the lead from terminal 2 to terminal 3 and check this reading against specifications.
Can a blower motor be repaired?
Many unusual sounds coming out of an HVAC system may be indicative of a problem in the blower motor. Some of the issues that cause strange sounds can be repaired by a
professional
, while others may require replacement of the motor.
How much does it cost to replace a blower motor?
Replacing a blower motor costs
$450 on average
with a typical range of $250 to $800. With a warranty, you might pay as little as $150 for labor alone. For high-end models, like those with large motors or access issues, you might pay as much as $2,000.
How long does it take to replace a blower motor in a car?
How Long Does It Take To Replace A Blower Motor In A Car? It generally takes
about 4 hours
for an experienced technician to do a blower motor replacement. If you are doing it on your own in your garage with common tools, you can expect the job to take 6 hours or more.
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.
Why does the blower in my car only work on high?
When a blower resistor fails, the highest fan speed usually is the only one that still works because it
essentially bypasses the resistor and receives the maximum amount of voltage
. When the resistor is working, it reduces the amount of voltage going to the lower fan speeds, so the fan runs slower.
What does a 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.
