Gas Furnace Making A Clanging or Banging Noise

A Gas furnace making a clanging or banging noise is most likely from loose or damaged components. You may have a damaged blower motor or broken fan belt. Other causes could be expanding and contracting metal ducts from overheating. Check to make sure your air filter is clean and for any loose panels or parts. If the problem persists call a service technician. Repairs are recommended right away as this problem could lead to greater damage to your blower motor. Estimated costs for repair including parts, labor and service fees to repair the fan belt are $150 - $250 and $400 - $1000 to replace the motor.

Severity

Moderate

What It Means

Your fan belt or blower motor are broken. If left unattended further damage may occur to the blower motor and double your repair costs.

Safe To Use

This problem does not cause any immediate danger but if left unattended could cause further damge to your motor.

Estimated Repair Costs (including service fees)

• Replace Fan Belt(Professional):$150 – $250
• Replace Blower Motor(Professional):$400 – $900

Causes

Causes include furnace overheating and causing ducts to expand and contract, broken fan belt, or a broken blower motor.

Repair vs Replace

You should repair your furnace for this problem as you may just need to replace the fan belt or blower motor.

Prevention

Keep all screws and panels tight, keep any debris from the motor, change your air filters every three months and schedule annual maintenance.