What does the Ideal 50 fault code mean?

Your boiler is failing to keep its small starter flame lit, which prevents the main heating system from firing up.

How much does it cost to fix Ideal error code 50?

Typical repair cost for the Ideal 50 fault is £120-£250 including labour.

Ideal 50 Fault Code: What It Means & How to Fix It

Technical description

PILOT WILL NOT STAY LIT WHEN THE GAS CONTROL VALVE KNOB IS RELEASED

What causes this fault?

This fault occurs when the boiler's safety mechanism fails to detect a constant flame, causing it to shut off the gas supply for safety. The most common reason is a worn-out sensor called a thermocouple that can no longer signal that the pilot light is safely lit, or a slight blockage in the pilot burner preventing a strong flame. In some cases, it may also be triggered by an internal safety switch that has tripped to prevent the unit from overheating.

Engineer required

This is a high 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 →

Your boiler is failing to keep its small starter flame lit, which prevents the main heating system from firing up.

Technical description

What causes this fault?

Engineer required

Related guides you might find useful

Boiler keeps cutting out

Pilot light keeps going out

Boiler won't turn on — 9-step checklist

Recently viewed