Gas Furnace Making A Humming Noise

A Gas furnace making a humming noise is most likely from bad ball bearings in the blower motor, over time these wear out and need to be repplaced. It may also be due to a failed capacitor, the blower motor is receiving power but will not turn on making the humming noise. Repairs are recommended immediately as this condition will cause further damage to the motor. Estimated costs for repair including parts, labor and service fees are $100 - $400.

Severity

Moderate

What It Means

The ball bearings are broken on the blower motor and will only lead to more damage to the motor if not repaired. Repairs should be scheduled with a service technician immediately.

Safe To Use

This problem does not cause any immediate danger but if left unattended could lead to more severe problems with your furnace.

Estimated Repair Costs (including service fees)

• Replace Ball Bearings(Professional):$150 – $400
• Replace Capacitor(Professional):$200 – $350
• Replace Blower Motor(Professional):$400 – $800

Causes

Causes include worn out ball bearings, broken capacitor, or seized blower motor.

Repair vs Replace

You should repair your furnace for this problem as you may just need new ball bearings or a new capacitor.

Prevention

Make sure your you keep any debris away from your blower motor, change your air filters every three months and schedule annual maintenance.