F61
Protherm Gas Valve Electrical Fault

Boiler displays F61; there is no ignition, or the gas valve is not operating correctly.

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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 short or open circuit in the gas valve coil, a damaged wiring harness to the gas valve, a PCB gas valve driver fault, or incorrect earthing or polarity.

How to Fix / Troubleshooting

Safety: Gas components must be serviced by a licensed technician.

Steps:

  • Inspect the gas valve connector and wiring for damage or loose contacts.
  • Measure coil resistance and compare with Protherm specifications; replace the gas valve if out of range.
  • Check wiring continuity from the PCB to the gas valve.
  • If the wiring and valve are OK, replace the PCB.
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Repair Difficulty

Professional Required 5/5

Required Part

Gas Valve
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