F14
Saunier Duval Gas type / combustion configuration fault

F14 displayed, unit fails to ignite or shuts down with gas-related alarm

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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

Incorrect gas type setting on PCB, Wrong injector/nozzle set fitted, Incomplete conversion from natural gas to LPG (or vice versa), Faulty gas valve calibration

How to Fix / Troubleshooting

Safety first: Turn off gas and power. Only certified gas technicians should modify gas settings or components.

Steps:

  • Verify gas type: Check the appliance data plate for the correct gas category (e.g., G20 natural gas, G31 LPG). Confirm the actual gas supplied matches.
  • Check conversion kit: If the unit was converted, verify that the correct Saunier Duval injector kit and settings were used.
  • PCB configuration: On models with configurable gas type, ensure the PCB parameters or DIP switches match the installed gas type.
  • Combustion check: A technician should perform a combustion analysis and adjust or replace components as needed.

Warning: Incorrect gas configuration can lead to dangerous CO levels. Do not operate the heater until the issue is resolved.

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Repair Difficulty

Professional Required 5/5

Required Part

Gas Injector Kit
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