Ravenheat Fan or Pump Bearing Wear

Furnace emits a high-pitched whine or screeching noise while running.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Worn fan bearings, Failing circulation pump bearings, Fan impeller rubbing on housing, Cavitation due to air in pump

How to Fix / Troubleshooting

Safety: Noisy mechanical components can seize and overheat. Isolate power before inspection.

User checks:

  • Try to identify whether the noise comes from the furnace casing or from pipework/pump nearby.
  • Bleed radiators to remove air that may cause pump noise.

Technician checks:

  • Inspect fan and pump for play and noise.
  • Bleed air from the pump and system.
  • Replace the fan or pump if bearings are worn.
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Repair Difficulty

Medium 3/5

Required Part

Combustion Fan Assembly
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