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).
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.
Can I replace blower motor resistor?
Remove the screws that secure the blower motor resistor to the housing, and put them someplace safe. At this point, you can remove the resistor from the housing. … Put your new resistor in position and connect the wire harness to the blower motor resistor. Then engage the wire harness connector locking tab.
What happens when a 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.
Can a resistor be repaired?
Resistors are easy to find if they have become defective because they can be measured with the electronic device turned off. Once a resistor is found to be defective, replacing it can return the electronic device to correct operation.
What causes a blower motor resistor to burn out?
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.
How much does it cost to replace a blower motor resistor?
The average cost for a blower motor resistor replacement is between $119 and $161. Labor costs are estimated between $47 and $60 while parts are priced between $72 and $101. Estimate does not include taxes and fees.
How much does it cost to replace a blower motor?
Cost to Replace Central or Forced Air 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 can I tell if my blower motor resistor is bad?
If the airflow from the vents is weak…
If you try to increase the air pressure and you feel no difference in the pressure blowing, then your blower motor resistor may be failing. A damaged blower motor resistor will work on one fan speed which may not be enough to keep the inside of your car cool or warm enough.
What are the signs of a bad blower motor relay?
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 signs of a bad blower motor?
You might also hear ongoing whirring noises, or noises that change or get louder if you increase the fan speed. These are all signs of problems with the blower motor. In some cases, you may even notice smoke or smells of burning while driving, in which case you should pull over immediately.
How can you tell if a resistor is blown?
Usually, the resistor gets hot, starts smoking, and makes a strange high-pitched squeal. Once a resistor has been blown, often no electricity can pass through it. Such resistors are said to have infinite resistance.
How do you fix a 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.
- Installation is the reverse of the removal.