How To Replace A Blower Motor In A Furnace - How Do You Diagnose A Blower Motor Problem?

If the blower motor isn't running you should:

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].

Is it worth repairing a furnace?

Your Furnace Is Old Consider 15 years a good cutoff when deciding if you'll replace or repair a furnace. If your furnace is older than that, it's likely time to replace your unit instead of investing hundreds or thousands of more dollars into repairs.

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

Here are some signs of a broken furnace blower motor:

1. Loud Operating Noises. When your blower has an issue, you might hear odd noises coming from your vents.
2. Weak or Absent Airflow. Weak airflow or total lack of it is the most obvious sign of a bad blower motor.
3. Overheating.
4. High Energy Bills.

Can a bad blower motor cause no heat?

Problems with Your Blower Motor or Blower Motor Resistor Without it, there's no circulation of air—hot, cold, or otherwise. The blower motor resistor is the part that controls the fan speed of the blower motor. Both of these components can fail, resulting in the heating system simply not working.

How much does it cost to replace a blower motor on a furnace?

Nationally, you can expect to pay about $450 on average for a blower motor replacement, including labor. However, if your unit is under warranty, you might get away with a labor-only charge of as little as $150. More complicated units, or units that are difficult to access, can cost as much as $2,000 to replace.

Is it worth it to replace a furnace blower motor?

In general, if your furnace is less than 12 years old, replacing your blower motor is probably the best choice, especially if you've kept your furnace on an annual inspection and maintenance schedule. Keeping your furnace well maintained will keep it performing well and help prevent component failures.

How long does a blower motor last in a furnace?

Blower motors are designed to last just as long as your furnace itself, anywhere from 10 to 20 years. Just as with any HVAC system, the better maintained and serviced your equipment is by experienced HVAC technicians the longer it will last and the fewer repairs you'll face.

Why is my furnace kicking on but not blowing heat?

When you turn the furnace on but no heat comes out, there may be an obstruction. Dirty air filters restrict airflow, which can make it feel like not much heated air is coming out of your vents. Check the furnace filter and replace it if its surface is covered with contaminants.

Should a 25 year old furnace be replaced?

Age of your Furnace If your furnace is pushing 25 years or more, it's probably nearing the end of it's effective lifespan. However, as already mentioned, this shouldn't be the end-all-be-all in the decision. You might choose to replace a 15 year old furnace, or it could last more than 30 years.

What does a bad furnace blower motor sound like?

A thumping, banging or clanking sound could be the result of a loose or broken off part in the motor or blower assembly. Should you hear one of these noises, turn off your furnace immediately. Call a professional to examine and repair or replace the broken part before you turn your furnace on again.

What causes blower motor failure?

Overheating. If your motor's electrics and bearings are constantly exposed to too much heat, then they will begin to fail. If you let your motor overheat repeatedly and fail, then either a component has broken or a bearing has seized.To prevent overheating, check your vents, filters, and in-room airflow.

How many blowers does a furnace have?

Furnace Blower Motor Cost vs. This is because it's the same part that carries out both functions. Whether you chill out without central air, or you have both heating and AC, you'll only have one blower motor to worry about.

Can a furnace run without a blower?

The furnace can produce heat inside the combustion chamber—but that heat won't go anywhere if the blower fan isn't running. Because there's a danger of the furnace overheating without the blower fan, the furnace won't operate unless the blower has power.

Is it hard to replace a blower motor?

The replacement of the blower motor is common and straightforward, so most shops will perform the repair — many on the same day.

What are the most common furnace repairs?

The most common problems with furnaces are:

• Dirty ductwork.
• Old filters.
• Faulty starting mechanism.
• Broken blower components.
• Malfunctioning heat exchanger.
• Bad Limit Switch.
• Thermostat in need of repair.
• Tripped circuit breaker.

How do I know if it's the blower motor or the resistor?

Blower Motor Resistor Test Typically, if the fan will work on some speeds but not on others, the resistor is suspect. Okay, let's say there's no melting going on, but your fan doesn't work on all speeds. Typically, if the fan will work on some speeds but not on others, the resistor is suspect.

How long does a blower motor usually 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. Proper cleaning and maintenance can also extend your unit's lifespan.

Can a dirty air filter cause your furnace to stop working?

Clogs May Cause the Furnace to Shut Down In the most severe cases, a dirty furnace air filter may cause damage to the internal components of the furnace. If the furnace isn't able to turn on, this is an indicator of damage to the fan, pilot light, heat exchanger, pressure switches, gas valves, or other components.

What is the most expensive part to fix on a furnace?

The three most expensive parts on a furnace are the blower motor, the circuit board and the draft inducer motor.

What happens if blower motor fails?

Power to the blower motor is fed through the blower motor resistor, so if it fails or has any issues power can be cut off to the motor. A blower motor without power will not be able to produce any air pressure, and as a result the heating and air conditioning system will be left with no air coming from the vents.