When should I replace my blower motor?

How do you know if you need a new 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 do you know if your blower motor is bad?

Be aware of the following signs and symptoms of a bad AC fan motor.

  1. AC Fan Doesn’t Start. Even though you have the AC turned on, the fan does not start.
  2. AC Fan Doesn’t Stop. …
  3. Slow Rotating Blades. …
  4. Outside Fan Blades Are Still. …
  5. Rattling, Humming, and Buzzing Noises. …
  6. AC Runs Intermittently. …
  7. No Cold Airflow.

How often do blower motors go out?

How often do blower motors go out? Even though the manufacturer states their blower motor will last two decades, we advise all clients to expect a 10-20-year life span due to age, use, and proactive maintenance.

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Do blower motors get weak?

Weak airflow is a sign of blower motor failure. This part wears out eventually, meaning its fans can no longer push adequate amount of air out the vents or through window defrosters.

Why does my blower motor work sometimes?

When a blower resistor fails, the highest fan speed usually is the only one that still works because it essentially bypasses the resistor and receives the maximum amount of voltage. When the resistor is working, it reduces the amount of voltage going to the lower fan speeds so the fan runs slower.

How much is a new 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 many ohms should a blower motor have?

According to the service manual, it must be around 4-5 ohms. In our case the ohmmeter shows open circuit, which means the resistor has failed. Sometimes, a blower motor resistor might fail due to problems with the blower motor itself.

How long is the warranty on a blower motor?

Most manufacturers for residential units will have a 5 year parts warranty that will cover any failed component within the system, although more manufacturers are offering up to 10 years on parts now. Some of these parts are the evaporator coil, compressor, fan motor, blower motor.

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How do you test a blower motor?

How to Test a Blower Motor

  1. Use voltmeter or ohmmeter to check for a blown fuse. If you find one, replace it.
  2. Start car and see if blower motor works. …
  3. If the circuits are in good repair but the blower motor keeps blowing fuses, replace the blower motor [source: You Fix Cars].

How long does HVAC fan motor last?

The average lifespan of an AC fan motor is about 12 years. An AC fan motor can last more than 12 years if it’s kept clean and cooled as needed. On the other hand, without annual maintenance checkups, your fan motor may only survive between one and three years.

Can a blower motor be repaired?

There are a number of things that can go wrong with your heating system, but if the air stops blowing altogether and the same is true on cold air settings, a blower motor replacement is likely in order. The good news is that it’s a fairly straight forward repair.