F16
Saunier Duval
Configuration / Parameter Fault
Boiler displays F16 and will not start, often after PCB replacement or power issues
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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 PCB configuration for boiler model, Corrupted EEPROM on PCB, Incompatible replacement PCB, Incorrect gas type setting
How to Fix / Troubleshooting
Safety first: Isolate power before accessing the control board.
Steps to check (engineer-level):
- Verify that the installed PCB is the correct part number for the specific Saunier Duval boiler model.
- Enter the installer menu and check configuration parameters (gas type, output, sensor options) against the installation manual.
- Reprogram or reset parameters if they are incorrect.
- If configuration cannot be changed or F16 persists, the PCB may be faulty and require replacement.
Warning: Incorrect configuration can cause unsafe combustion. Only trained personnel should alter installer settings.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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