A screeching or squealing sound coming from your furnace blower motor could mean there is a bad belt or an issue with the motor bearings. Replace the belt with the correct part for your furnace if necessary (Reference your manual to be sure, or call a furnace repair specialist).

How do I stop my blower from making noise?

High static pressure makes airflow more audible

1. Adjust the fan speed. Your blower or furnace fan should be set to deliver the proper airflow per ton.
2. Add ductwork.
3. Add a bypass duct.
4. Add or expand grilles and registers.
5. Replace existing registers and grilles with high velocity models.

What causes noisy blower motor?

One cause for this sound is that the blower wheel came loose from the motor shaft, moved and is hitting the blower housing. In this case, if no damage was done to the wheel or the motor shaft, it could be moved back to the proper spot and re-tightened to the motor.

What does it sound like when your blower motor goes out?

A defective blower motor will make a continuous sound noticeable by the passengers in the vehicle. It can manifest as a knocking, whirring, clunking, vibrating, squealing, or whining noise that persists until the blower motor is replaced.

What are the signs of a blower motor going bad?

What Are Signs Your Blower Motor Needs to Be Replaced?

• Poor or Airflow from Air Vents. This will be the first and most obvious sign your blower motor has a problem.
• No Airflow At All From Vents.
• Skyrocketing Energy Bills.
• Strange Noises When You Turn on the Heat.
• Overheating Blower / Weird Smells.

How do you fix a noisy fan motor?

The results are a long-lasting fan for years to come.

1. Clean off the Blades. The simplest way to calm a noisy ceiling fan is by cleaning the blades.
2. Tighten the Blade Screws.
3. Tighten Light-Fixture Fasteners.
4. Examine Any Warped Blades.
5. Secure the Upper Canopy.
6. Lubricate the Fan Motor.
7. Balance the Blades.
8. Check the Pull Chain.

Can you lubricate a blower motor?

If the motor has oil ports, it should be lubricated annually. Apply two or three drops of 10-weight nondetergent motor oil (not all-purpose oil) to each port. If the blower shaft has oil ports, it, too, should be lubricated annually, following the same procedure.

Can a blower motor cause a fire?

The blower motor ends up running for much longer periods of time, making it prone to overheating. Any overheating furnace component is a serious problem. If temperatures climb too high, components such as the blower motor may catch on fire.

How much does it cost to fix a 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.

What does bad furnace motor sound like?

When you hear a high pitched squeal, or whining sound coming from your furnace the issue could very well be the bearings on your blower motor. A blower motor will get very hot if the motor is trying to turn but won’t because of some sort of blockage.

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.

Why does my blower motor work sometimes?

When a resistor fails, the fan will often run only at higher speeds or the highest speed, no matter what fan speed is selected. 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.

How long does a blower motor last?

The blower motor in your home or office should last anywhere from 10 to 20 years. Modern sealed bearings and sealed bushings can push the lifespan to its maximum of 20 years.

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.