You asked: What causes a furnace blower motor to go bad?

Like other components in your HVAC system, the blower motor can wear down over time. Some of the reasons a blower motor might fail are overheating, and excessive moisture. … Blower motors that are clogged with debris, or that become saturated with moisture can fail due to overworking or electrical shorts.

How long should a furnace blower motor last?

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.

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

Signs of an Overheating Blower Motor

  1. A “hot” or burning smell from vents in the home. This symptom is often coupled with the furnace shutting off completely. …
  2. Loud humming and other unusual noises. We have many homeowners call us mentioning humming and other odd sounds. …
  3. Furnace cycles off and refuses to restart.

What can cause a blower motor to stop working?

In most cases, a blower motor resistor fails due to corrosion or overheating. Sometimes, the mechanical resistance to the motor rotation causes an excessive electric current that can overheat and prematurely damage the blower motor resistor.

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How much should it cost to replace a furnace blower motor?

An HVAC blower motor replacement costs an average of $450 but anywhere from $150 to $2,000 to replace. It doesn’t matter if you have a gas furnace, electric or heat pump, they all use an air handler blower motor to push the air throughout your home’s ducts.

What happens when blower motor goes bad?

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.

Why does my blower motor resistor keeps going 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.

How do you diagnose a bad blower motor?

Bad Blower Motor Symptoms in HVAC

  1. Airflow is weak from the vents. This is often one of the first signs or symptoms of a bad blower motor. …
  2. Sounds Coming From the Blower. …
  3. Overheating is One of the Symptoms of a Bad Blower Motor in HVAC.

How do you reset a furnace blower motor?

How to Find and Reset your Furnace Motor Blower

  1. Step 1: Turn off the power to the furnace. …
  2. Step 2: Remove the blower compartment cover. …
  3. Step 3: Make sure the blower is completely cooled off. …
  4. Step 4: Locate the reset button. …
  5. Step 5: Press the button in (assuming that this is your issue and that the button has popped).
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Is it hard to replace a blower motor?

If you don’t want to sweat or shiver, then find a good mechanic. The replacement of the blower motor is common and straightforward, so most shops will perform the repair — many on the same day.

Can a furnace blower motor be repaired?

Standard blower motors operate at a single speed and cost around $450 to replace, including parts and labor, while variable-speed motors cost $600 and up. However, if your HVAC blower motor isn’t too badly damaged, the technician may be able to clean and repair it so you won’t have to incur the cost of a replacement.

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.