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How to Replace a Blower Motor Resistor Step 1: Remove the glove box door, if necessary. Step 2: Disconnect the wiring harness and remove screws. Step 3: Remove and replace the blower motor resistor. Step 4: Tighten screws and reattach wiring harness. Step 5: Reinstall the glove box door.
How do I know if my blower motor resistor is bad?
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.
How long does it take to replace a blower motor resistor?
takes about 45 minutes.
How do you replace a resistor?
Take the circuit board on which the resistor is soldered and cut the wire leads with diagonal cutters. Remove the defective resistor. Turn on the soldering iron. Place the tip on the lead and the pad through which the lead is placed until the solder melts.
How do you 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.
Where is the heat resistor located?
Heater Blower Motor Resistor Location The heater blower motor resistor is often found beneath the dashboard. It is located in the heater and air conditioning compartment. It’s connected to the air conditioning system, where it can adjust the speed of the blower motor fan.
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.
Why does my blower motor resistor keeps melting?
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. Many Dodge forums tell of this problem.
How much is a motor blower resistor?
How Much Does a Blower Motor Resistor Replacement Cost? A blower motor resistor costs anywhere between $1 and $400. Factors that can affect its price include its condition, configuration, material, and set or kit inclusions. Labor may cost you an extra $45 to $55, depending on your area.
Why does the heater in my car only work on high?
Most car manufacturers use a series of resistors to make the heater blower motor run at different speeds. And when one or more of these resistors burn out, you’re usually left with only one heater blower motor speed—high. Remove the screws, and swap out the resistor module.
Can I replace the resistor with another?
Sometimes you need a resistor with a value you don’t have in your kit. Instead of ordering and wanting for a resistor with a value you need you can change the resistance of a resistor by using another resistor or many. By installing resistors in a parallel or series circuit you can change the value in Ohms.
What happens when a resistor burns out?
When a resistor breaks down, current typically flows through the burnt resistor without any resistance and thereby passes unchecked. Other components in the circuit may become damaged from the excess current flowing through.
Can a blower motor resistor be repaired?
The average cost to replace the blower motor resistor at a repair shop is between $44 and $55 in parts and $70 in labor costs, for a total cost of around $114 to $125. On the other hand, you can easily fix the blower motor resistor at home in about an hour (even if you’re a beginner) and for around $70.
Why does my blower motor fuse keep blowing?
While the blower motor is clogged up, it can cause fuses to blow because it has to work hard to try to operate. The fuse is also attempting to run, and because it is unable, this increases the chances of a furnace fire.
Why is my blower not working in my car?
If little air is coming through the vents (hot or cold), then it could be because the blower motor for the fan or a switch or resistor that controls fan speed isn’t working. Another cause might be that the electronically controlled “blend doors” that direct air flow are stuck or broken.
Is there a fuse for the blower motor?
Many vehicles have two fuses for the blower motor, one in the interior fuse block and the other under the hood. The blower motor is usually under the dashboard on the passenger side.
Is there a fuse for the heater blower?
The blower motor is powered by a fuse-like device called a relay. If your heater or air conditioner does not blow air through the vents, this could indicate that the blower motor fuse has probably blown. While replacement is easy, the exact location of your blower motor fuse may vary from vehicle to vehicle.
Can a bad blower motor cause no heat?
Problems with Your Blower Motor or Blower Motor Resistor Your blower motor is the component that pushes air through your car’s heating or cooling system. Without it, there’s no circulation of air—hot, cold, or otherwise. Both of these components can fail, resulting in the heating system simply not working.
What are the symptoms 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. Blown relay circuit fuses or melted relays are more serious signs of a bad blower motor relay.
Why is my blower fan not working?
Make sure that the power cord hasn’t melted or a fuse hasn’t been blown. If your cables are looking fine, try unplugging the fan for a few minutes and then plugging it back in again. If unplugging and plugging your fan back in again doesn’t work, check the fuse box.
