High
E128 on Main Eco Compact Combi

Your boiler has lost its flame while running, which means it has safely shut down to prevent issues.

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.

What the manual says

Manufacturer manual

Flame error

From this model's manual
Verified against the Main/Main Eco Compact installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

What causes this fault?

This fault occurs when the boiler's control system loses the signal that a flame is present while it should be firing. It is often caused by a buildup of carbon on the electrodes or a blockage in the condensate trap that backs up and 'drowns' the flame. In some cases, it can also be triggered by an inconsistent gas supply or a failing gas valve that cannot maintain a steady flow.

This fault is more common during extreme cold spells, as a frozen external condensate pipe can cause water to back up into the boiler 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.

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Related fault codes

All 71 fault codes on the Eco Compact Combi

Seeing a different code? Every code this model can display, in one place.

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