Ideal boiler displays L6 and will not operate

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.

Possible Causes

Shorted flame sensor lead, Moisture on burner or electrode, PCB flame detection fault, Incorrect earthing

Safety first: Turn off the boiler at the fused spur. Do not attempt to access internal components.

User checks:

Check for leaks: Look for water dripping from the boiler or pipework above it. If present, turn off the boiler and water supply and call an engineer.
Reset once: After ensuring the area is dry and safe, turn the boiler back on and reset.

If L6 returns, a Gas Safe engineer must inspect the flame sensor wiring, check for moisture in the combustion chamber, and test/replace the PCB.

Professional Required 5/5

Flame Sensor Harness

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