Dimplex Mechanical Wear of Fan or Pump

Boiler is very noisy with whirring or grinding sounds from inside the casing

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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 bearings in Dimplex flue fan, Worn bearings in Dimplex circulation pump, Debris caught in fan impeller, Cavitation due to low system pressure

How to Fix / Troubleshooting

Safety first: Do not run the boiler for long periods if mechanical noises are severe, as further damage may occur.

User checks:

  • System pressure: Ensure pressure is correct to avoid pump cavitation.
  • Location of noise: Try to identify whether the noise is from the top (fan area) or lower front (pump area) of the Dimplex boiler without removing covers.

Professional repair:

  • Replace the noisy Dimplex fan or pump assembly.
  • Check for debris and clean the fan housing.
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Repair Difficulty

Medium 3/5

Required Part

Dimplex flue fan assembly
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