How do I know if my blower motor resistor is bad?

What are the symptoms of a bad blower motor resistor?

1. No Air.
2. High speeds only.
3. Low speed only.
4. Fan won’t turn off.
5. Blower motor works on some settings but not others.
6. Smoking vents.
7. Burning smell.

Where is the rear blower motor resistor located?

The rear blower motor resistor is mounted to the inboard side of the rear heating-A/C housing, located on the right side of the vehicle. The rear blower motor resistor consists of a molded plastic mounting plate (1) with an integral wire connector receptacle (2).

What happens when the blower motor resistor goes out?

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.

How much does it cost to replace a blower motor resistor?

The average cost for blower motor resistor replacement is between $114 and $125. Labor costs are estimated between $44 and $55 while parts are priced at $70.

How much does it cost to fix a blower motor resistor?

Can you fix a blower 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.)

What happens when blower motor resistor goes bad?

What are the symptoms of a bad blower motor?

Here are just a few of the signs that your blower motor is going bad.

• Weak airflow. This is one of the first signs of a bad blower motor that people tend to notice.
• Noises. Have you noticed any unusual noises coming from your vehicle’s HVAC system?
• Smoke or smells.

What would causes a blower motor resistor to go bad?

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.

Where is the blower motor resistor located on a car?

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.

Is the speed of the blower controlled by the resistor?

The blower speed can be adjusted in almost every modern car. Some cars have blowers that have 4 to 5 fixed speed settings that can be selected, but in this case, the speed of the blower motor is controlled by a blower motor resistor. 1. No air blowing through vehicle’s vents

Where is the motor for the heater blower located?

The motor that turns the blower is called the blower motor. It is located in the dashboard, usually on the opposite side of the steering wheel or inside the engine compartment on the firewall. The blower speed can be adjusted in almost every modern car.

The blower motor resistor or control module replacement is not very expensive. For example, one of our colleagues had a problem with his 2011 Ford Escape: the fan only worked at the speed 4. He paid $50 to diagnose and $112 to replace the resistor at a local Ford dealership.

Here are some of the warning signs of a bad heater blower motor resistor:

1. Fan does not work at all, so no air comes out of the vents.
2. Fan only works on some speeds and not others.
3. Fan only works on the highest speed.
4. Fan runs all the time and can’t be controlled with the fan switch.
5. You see smoke coming out of the vents.

What can a bad blower motor resistor cause?

The most common symptom of a failed blower motor resistor is when the heater fan only runs at the highest speed setting (4 or 5) and doesn’t work at low speeds. In some cars, a failed blower motor resistor can cause a heater fan to stop working completely.

Can you fix 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).

What is the purpose of a resistor on a blower motor?

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 long does it take to replace a blower motor resistor?

about 45 minutes
takes about 45 minutes.

What are the symptoms of a bad blower motor resistor?

Blower motor stuck on one speed. A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. Blower motor does not work on certain settings. No air from the vehicle’s vents.

Where is heater blower motor rsistor located?

The heater blower motor resistor is located underneath the dashboard in the heater/AC compartment. The resistor enables the heater blower motor to change the speed of the fan.

Where is the fuse for the heater blower?

The blower motor fuse should be a 30 amp located in the passenger compartment just to the left of where the driver sits, underneath the dash above the left kick panel. It should be marked blower.

What does a blower motor resistor do?

Definition. 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. These resistors allow the blower motor to function at lower speeds.