F62
Protherm
Gas Valve Shut-off Delay / PCB Control Fault
Boiler displays F62; the gas valve may remain energized incorrectly after shutdown.
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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
A sticking gas valve, a PCB relay or triac fault, or a wiring short causing the valve to remain powered.
How to Fix / Troubleshooting
Critical safety: If you suspect the gas valve is not closing properly, isolate gas and power immediately. Do not operate the boiler.
Technician steps:
- Test the gas valve for correct closing operation and replace if it sticks or leaks.
- Inspect the PCB for stuck relays or damaged components controlling the gas valve; replace the PCB if necessary.
- Check wiring for shorts that could keep the valve energized.
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Repair Difficulty
Professional Required
5/5
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