High
Flame Failure (Red Light) on Potterton Promax FSB 30HE

Your boiler has tried to light but failed to stay on, meaning the system has shut down for safety until it is reset or repaired.

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

If Flame Failure Light is ON. Press the Reset Button. If Flame Failure occurs persistently consult your Installer or Service Engineer.

From this model's manual
Verified against the Potterton Boiler Promaxfsb30he 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 internal sensor fails to detect a steady flame after several ignition attempts. The most common reasons include a lack of gas reaching the burner, dirty electrodes that can no longer spark correctly, or a faulty sensor that cannot 'see' the flame even if it has lit.

This fault is more common during the first cold snap of winter when components that have been idle all summer are suddenly forced to work under high demand.

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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Avoid the next call-out bill

A cover plan would handle faults like Flame Failure (Red Light): no call-out fees, no surprise bills.

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