0 (Flashing) High

Potterton 0 (Flashing) Fault Code

Also written as 0FLASHING — same fault.

The Potterton 0 (Flashing) fault code means: your boiler has stopped working because it failed to ignite or got too hot, and it now needs a manual reset to try and start again.. It appears on 1 Potterton model in our database.

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: Boiler at Lock-Out. Indicates burner failing to light during a start sequence or a high temperature being recorded.
Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Potterton models that show the 0 (Flashing) fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Potterton 0 (Flashing) fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026