What causes blower motor failure?

Blower motor breakdown can be the result of anything from old age to failed bearings, high amp draw, electrical failure in the windings, dirt accumulation, and more. “The most common cause is dirt accumulation due to lack of maintenance,” said Tom Beaulieu, president of Bay Area Services Inc. Blower motor resistor keeps failing Worn blower motor causes repeat blower motor resistor failure. Resistors, like a flow restrictor in a pipe, are designed... High resistance in the electrical connector can cause repeat blower motor failure. Actually, corrosion or poor contact... Water, leaves and debris in the airflow can cause blower motor resistor failure. The HVAC... More ...

Why does a blower motor fail?

What Causes Blower Motor Failure? 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. When dust, dirt, and debris build up, it can cause the windings and bearings to burn up more quickly.

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.

Why did my blower stop working?

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. Another cause might be that the electronically controlled “blend doors” that direct air flow are stuck or broken.

Why does a blower motor fail?

What Causes Blower Motor Failure? 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. When dust, dirt, and debris build up, it can cause the windings and bearings to burn up more quickly.

How long should a blower motor last?

How long should a car blower motor last?

For the most part, the heater blower motor on your car is supposed to last as long as the actual vehicle does. Due to the harsh conditions that this blower motor has to operate in, it will usually end up having repair issues. There are a variety of problems that the blower motor may have that will render it useless.

How much does it cost to replace a blower motor?

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

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 much does it cost to replace a blower motor in a car?

Where is the blower motor reset button?

Locate the reset button on the furnace and press it to reset the furnace. It is usually located inside the blower compartment on the side of the blower motor. Be cautious as the housing may be hot. If the button is popped up, press it down.

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.

Is there a fuse for blower motor?

How much does it cost to replace a blower motor?

How much does it cost to replace a blower motor in a car?

Why does a blower motor fail?

What Causes Blower Motor Failure? 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. When dust, dirt, and debris build up, it can cause the windings and bearings to burn up more quickly.

When should I replace my blower motor?

One of the most common indicators that you need to replace your furnace and AC blower motor is that it will become very noisy. Eventually the system will just stop blowing air altogether. Often there will be a buzzing sound indicating that the motor is unable to start and has overheated.

How many blower motors are in a car?

The number of blower motors in your vehicle depends on its climate control system. Some cars have one blower motor, but that may not be the case for some SUVs and vans. They may have two motors, one in the heater box and another in the vehicle's rear area.

Can you drive a car without a blower motor?

Your car's blower motor is not only necessary for the operation of your air conditioner. Without a functioning blower motor your engine runs the risk of overheating.

Why do I have to hit my blower motor to work?

Blower motor only start working after i hit a bump. In most cases that is a sign of worn down blower motor brushes not making a good contact. In some cases the blower motor/resistor pigtail could cause erratic operation of the blower motor too.

Do blower motors get weak?

Similar to other components in an HVAC system, the blower motor will become more vulnerable to mechanical failures as it experiences more wear and tear over time. If your air conditioner is aging and becoming increasingly problematic, there's a good chance the motor is in trouble.

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.

Are blower motors expensive?

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.

Where is a blower motor located?

The blower motor is usually under the dashboard on the passenger side. Blower motors that make loud squeaks or rattling noises may be worn out and on the verge of packing it in, but sometimes those noises are caused by leaves or other debris that can be cleaned out after the motor is removed from the vehicle.

Should you replace blower motor and resistor at the same time?

We do suggest that you replace the resistor at the same time. It may not be critical, but this will keep the system more uniform. The issue may even be related to the resistor. If you know that it is not related to the issue, then you do not have to replace it.

Should you replace the resistor when you replace the blower motor?

If the blower motor resistor fails, the blower motor will still work, but it will be stuck on one speed in most cases. If you remove the resistor completely, the blower motor fan will still work at one speed, in most car models. This is because usually the resistor is not used for the highest speed setting.

Why is my AC fan blower motor not working?

The most common causes for AC fan blower motor not working are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working.

What causes a blower motor fuse to blow?

If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current from a bad relay will blow the fuse and cut power in order to protect the system.

What causes a blower motor resistor to fail?

Blower motor resistor failure is most commonly shown when the heater fan only operates at the highest speed setting (4 or 5) and does not operate at lower speeds. Is it also intended for the blower motor resistor to become hot during operation?

What does it mean when a blower motor has reduced airflow?

Reduced airflow is when the blower motor is trying to move air through the vents but the resistor isn’t sending enough power to move the air with much pressure. Depending on how much resistor is still functioning, the reduced airflow could be an intermittent problem. Will blower motor work if resistor is bad?