Emergency Lockout
E36 on Remeha Quinta 30

Your boiler is correctly sensing a flame when it expects the burner to be extinguished, which is typically caused by a faulty internal sensor or a gas valve that isn't closing properly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description

Flame signal present while burner should be off: check gas valve and ionisation probe.

What causes this fault?

This fault occurs when the boiler’s control system detects a flame inside the unit even though it has commanded the heating to stop. The most common reason is a gas valve that is stuck open and leaking fuel into the burner, or a faulty internal sensor that is incorrectly reporting a flame signal. Because the boiler cannot safely extinguish the heat, it shuts down entirely to prevent overheating or gas build-up.

Engineer required

This is a emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer
Search the official register →

Related fault codes

E02View →E04View →E11View →

Related guides you might find useful

Boiler keeps cutting out

Lockout fault with a reset-needed pattern.

Read →

Pilot light keeps going out

Older boilers — thermocouple, draught, gas supply.

Read →

Yellow or orange flame — CO safety

Safety-critical — turn off, read this.

Read →