Should a blower motor resistor get hot?

Many blower motor resistors are designed such that they would burn up if they are not in the path of the air from the blower fan. They are that close to tolerance. Not because manufacturers like to burn stuff up but higher wattage resistors get very big and very expensive….. even those will get hot.

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

Symptoms 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.

Why does my blower motor resistor keep burning 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.

Can a blower motor resistor work intermittently?

When the resister of the blower motor starts to fail, the motor operates only intermittently. … The higher current can make the jump across the resistor contacts that are going bad and get the blower motor to engage.

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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 are the signs of a bad blower motor?

5 Signs Your Blower Motor Needs to Be Replaced

  • Weak Airflow from the Vents. This is usually the first indication that you may have a faulty blower motor. …
  • No Airflow at All. …
  • Unusually High Energy Bills. …
  • Strange Sounds. …
  • Overheating.

How much does it cost to replace 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.

How do you fix a blower motor resistor?

How to Replace a Blower Motor Resistor

  1. Remove the negative battery terminal. …
  2. Locate the blower motor resistor on the passenger side under the dash board. …
  3. Disconnect the electrical connector to the blower motor resistor.
  4. Remove the screws or bolts to the blower motor resistor and remove the resistor.

Is there a fuse for the blower motor resistor?

Some GM Blower Motor Tips

A fuse is often located on the resistor board. The fuse only protects the low and medium blower speeds. High speed will still work if the resistor fuse is blown.

Is there a fuse for the blower motor?

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.

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What can cause a blower motor to stop working?

In a situation where the motor doesn’t work on any speed, the most likely causes are: a blown power supply fuse, a bad motor ground connection, bad motor speed control module or a failed motor. On all systems, a failed blower motor is least likely. Start by checking the blower fuse and HVAC controller fuse.