F2
Caple Flame Failure Device / Safety Valve Fault

Gas hob with digital display shows F2 and gas supply is cut off to all burners.

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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

Defective flame failure thermocouple, Faulty flame safety valve, Loose thermocouple connection to valve, Faulty safety control PCB

How to Fix / Troubleshooting

Safety first: Turn off gas at the isolation valve. Work on gas components must be carried out by a Gas Safe registered engineer (or equivalent in your region).

Technician checks:

  • Inspect each burner’s thermocouple for correct positioning in the flame and for damage or kinks.
  • Check that the thermocouple nuts are tight on the flame safety valves.
  • Measure thermocouple output (mV) when heated; replace any that do not generate sufficient voltage.
  • If all thermocouples are good, test the safety valve manifold and any associated safety control PCB for correct operation.

Remedy: Replace faulty thermocouples or safety valves. After replacement, perform a full gas tightness test and burner flame check.

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Repair Difficulty

Professional Required 5/5

Required Part

Flame Failure Thermocouple
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