EHC
Mechanical Noise from Fan or Pump
Boiler is very noisy with whirring or grinding sounds from inside.
Advertisements
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.
Advertisements
Possible Causes
Worn fan bearings, Worn pump bearings, Air in pump, Debris in fan impeller
How to Fix / Troubleshooting
Safety: Isolate power before touching the boiler. Moving parts can cause injury.
User checks:
- Note when the noise occurs (start-up, running, only on heating or hot water) to help diagnosis.
Engineer checks:
- Identify whether noise originates from the fan or pump on the EHC boiler.
- Bleed the pump to remove air and check for smooth operation.
- Inspect the fan for debris and check for excessive play in the bearings; replace the fan if noisy.
- Replace the circulation pump if bearings are worn or it is excessively noisy.
Prompt replacement of noisy mechanical components can prevent complete failure and further damage.
Advertisements
Repair Difficulty
Hard
4/5
Advertisements