Gas Furnace Making Buzzing Noise

A gas furnace making a buzzing noise is due to electrical issues which may include a failed capacitor, failed transformer, or broken blower motor. Replace your air filter if its dirty and make sure your air ducts are not being blocked. If the problem persists call a service technician. Estimated costs are $150 - $400 to replace the broken capacitor or as high as $500 - $1000 to replace the blower motor. Repairs are recommended within 1 - 3 weeks.

Severity

Moderate

What It Means

Due to a faulty capacitor the blower motor may be stuck and causing a buzzing noise.

Safe To Use

The furnace is probably safe to use but repairs are recommended within 1 - 3 weeks.

Estimated Repair Costs (including service fees)

• New Capacitor(Professional):$150 - $400
• New Transformer(Professional):$150 - $550
• New Blower Motor(Professional):$400 - $1000

Causes

A faulty capacitor causes the combustion blower motor to get stuck.

Repair vs Replace

You should repair your furnace for this problem. You may need a new capacitor, your transformer replaced, or new blower motor.

Prevention

Replace your air filters every three months and make sure your ducts are not being blocked. Schedule annual maintenance.