What makes a blower motor go bad?

Blower motors go bad due to one of a few reasons: Overheating from airflow restriction. Bad bearings. Damaged fan blade/scraping sides.

What causes a blower motor to go bad?

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.

What are the symptoms of a bad blower motor?

SIGNS OF A BAD BLOWER MOTOR

  • FAN BLOWS AT ONLY A CERTAIN SPEED. …
  • WEAK AIRFLOW OF THE BLOWER MOTOR. …
  • UNUSUAL NOISES FROM HVAC SYSTEM. …
  • SMOKE OR SMELL WHEN DRIVING. …
  • HOW DOES A CAR BLOWER MOTOR WORK?

What happens when blower motor relay goes bad?

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.

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How much does a new blower motor cost?

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.

How do I know if it’s my blower motor or resistor?

The most common symptom of a bad blower motor resistor is the blower motor will only work at one or two speeds. It can also cause the blower motor to stop working completely and you will notice no air coming from the vents.

How do you tell if it’s the blower motor or resistor is bad?

Here are some of the warning signs of a bad heater blower motor resistor: Fan does not work at all, so no air comes out of the vents. Fan only works on some speeds and not others. Fan only works on the highest speed.

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.

How much does it cost to replace a blower motor relay?

The average cost for blower motor relay replacement is between $73 and $83. Labor costs are estimated between $36 and $46 while parts are priced at $37.

Where is blower motor relay located?

The blower motor relay is located in the under hood power distribution center and is simply labeled “Blower.” It will only take a few minutes to inspect and replace the relay if necessary.

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