Boiler displays E16, heating may work intermittently, and the fan speed seems abnormal (too high or too low).
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Isolate power before touching the fan or its wiring. Fan blades and flue components can be sharp and hot.
Step-by-step checks:
- 1. Listen to fan: On start-up, note whether the fan runs smoothly or surges. Grinding or rattling noises indicate mechanical wear.
- 2. Inspect wiring: Check the multi-pin connector between the fan and PCB. Reseat it and look for damaged pins or insulation.
- 3. Clean fan and venturi: Dust and debris can affect airflow measurement. Remove the fan assembly if accessible and clean the blades and venturi with a soft brush.
- 4. Reset boiler: After cleaning and checking connections, reset the boiler and observe operation.
When to stop: If E16 persists, the fan or PCB modulation circuit likely needs replacement and combustion must be checked by a professional.
Repair Difficulty
Required Part
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