Should a blower motor resistor get hot?

Don’t know for sure about the specifics, but resistors are designed to get at least warm, if not hot. If it gets hot to failure, then you got other problems, like a short somewhere including in the motor.

What are the signs of a bad blower motor resistor?

What are the symptoms of a bad blower motor resistor?

  • No Air. …
  • High speeds only. …
  • Low speed only. …
  • Fan won’t turn off. …
  • Blower motor works on some settings but not others. …
  • Smoking vents. …
  • Burning smell.

29.04.2020

Why do I keep burning up blower motor resistor?

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.
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Can you drive without a blower motor resistor?

except blower motor resistors don’t “wear out”; they stop working altogether, suddenly, when the resistance wire inside burns through. Even then, it’s safe to drive the car provided that it has no exhaust leaks which might permit carbon monoxide or oxides of nitrogen to enter the passenger compartment.

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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).

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

As we can see, the blower motor resistor costs between $150 and $400 and can usually be completed in about an hour to an hour and a half. These repairs are fairly simple and usually on the cheaper side for most common vehicles.

What would cause a resistor to burn up?

Burning of Resistor

When a resistor has been overloaded with voltage exceeding its power rating, the resistor will become very hot to touch, darken considerably and possibly even melt or catch on fire. Although a resistor may appear damaged at this point, it can still be functioning.

How long do blower motor resistors last?

The blower motor resistor is designed to last for the car’s lifespan. In most cases, these resistors will wear out long before the car does. Usually, the wear that the blower motor resistor has is due to the constant use that it gets and the heat that it is exposed on a regular basis.

Why is my blower motor not 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.

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What is the purpose of a blower motor resistor?

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.

Is it bad to drive with a bad blower motor?

A faulty blower motor can disable an otherwise fully functional heating and air conditioning system, which will make the driving experience less comfortable for the vehicle’s passengers. … This article originally appeared on YourMechanic.com as Symptoms of a Bad or Failing Heater Blower Motor.

Can you drive with a bad blower motor?

If your blower motor stops working or even short circuits, you will have no airflow produced for the system. … Additionally, a bad blower motor can also disable a completely operational A/C and heating system. Of course, you will not want to drive your car in extreme heat or cold from outside.

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