Error 17; heater cycles rapidly on and off, or fails to modulate correctly.
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: Gas adjustments must only be performed by a licensed gas technician.
User-level checks:
- Ensure adequate gas supply: Avoid running multiple high-demand gas appliances simultaneously if supply is marginal.
- Check flue and air intake: Poor combustion due to restricted air can affect modulation. Clear any obstructions.
Technician tasks (for reference only): A professional will check burner pressure, adjust the gas valve, and verify combustion with a flue gas analyser.
Repair Difficulty
Required Part
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