High Lockout
4.4 on Ideal Vogue Gen2

Your boiler is struggling to keep a flame lit, which means the system has safely shut itself down to prevent a fault.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

FLAME LOSS

What causes this fault?

This fault occurs when the boiler's internal sensors lose track of the flame after it has already started. The most common reasons are a buildup of carbon on the ignition parts or a blockage in the condensate trap that causes water to back up into the heat exchanger. It can also be triggered by an unstable gas supply or a faulty gas valve failing to maintain a steady flow.

This fault is more common during freezing winter temperatures, as a frozen external condensate pipe can cause water to back up and extinguish the flame.

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 →

Related guides you might find useful