What is a fan motor?

What is a Fan Motor & What Does it Do? The purpose of your air conditioner’s condenser fan motor is to keep the compressor from overheating. Its job is to cool the superheated refrigerant that moves through the condenser coils of your AC unit, which helps to cool your home.

What is the function of fan motor?

The air conditioner fan motor drives the AC fan, which blows air in and out of the house. This is important for moving hot air to the outside of the building, as well as blowing cool air through the ductwork and into the rooms. The fan motor is a vital part that must be running well for the AC unit to do its job.

What happens if your fan motor is bad?

If there’s something wrong with the fan motor, it could cause the blades to start acting strangely. The blades might not start up when the air conditioner does, or they might not stop spinning once the air conditioner shuts off.

How much does it cost to replace a fan motor on an AC unit?

Even though fan motors don’t contain oil ports nowadays and thus don’t need lubrication, they still need to be replaced from time to time. Replacing your AC unit’s fan motor isn’t as expensive as you might think. This repair can range from $450 minimum to about $650, depending on your unit.

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Is a fan motor the same as a blower motor?

What Is a Blower Motor? Unlike the condenser fan motor, the blower motor is located indoors. It’s the component that blows cool air through the ducts and into different parts of your home.

What causes fan motor to overheat?

Lack of maintenance: This is probably the most common reason that causes condenser fan motors to overheat and shut off. Proper and regular lubrication of the fan motor is necessary for the motor to run smoothly. … If the motor is too small, it will run too hard and then overheat.

How do I know if my condenser fan is bad?

5 Signs Your AC Fan Motor Is Bad

  1. The cooling fans won’t turn on.
  2. The fan turns on when the AC is running, but the blades rotate slowly.
  3. You can hear a rattling noise coming from the condenser unit.
  4. It smells like something’s burning.
  5. Blown fuse.

How do you know if a fan motor is bad?

7 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.

Why do fan motors fail?

The main causes of failure are loss of lubricant, a failed run capacitor, a failed bearing in a belt drive, a little water dripping into the windings or a voltage problem. So technicians should carefully check to find the cause of a failure before changing the motor.

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When should I replace my AC fan motor?

Signs that your fan is having issues include the following:



The fan won’t start even though the AC is on. The fan won’t stop, even when you shut the AC off. The fan turns on, yet the blades are rotating very slowly. There’s a rattling noise coming from the condenser unit when the fan is turned on.

What causes an air conditioner fan to stop spinning?

One of the most common reasons fans stop spinning is because of a dead capacitor. … Each air conditioning system has several capacitors, including the start capacitor, which sends signals to the motor, and the run capacitor, which keeps the motor running. Capacitors can go bad over time and need to be replaced.

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