How much does it cost to fix Potterton error code Pulse Red (5 flashes)?

Typical repair cost for the Potterton Pulse Red (5 flashes) fault is £120-250 including labour.

Pulse Red (5 flashes) High

Potterton Pulse Red (5 flashes) Fault Code

Q: What does the Potterton Pulse Red (5 flashes) fault code mean?

Your boiler has detected that the flame inside has gone out unexpectedly while it was running, so it has safely shut itself down to prevent gas from escaping.

Also written as PULSERED5FLASHES — same fault.

The Potterton Pulse Red (5 flashes) fault code means: your boiler has detected that the flame inside has gone out unexpectedly while it was running, so it has safely shut itself down to prevent gas from escaping.. It appears on 2 Potterton models in our database.

Technical description: Continuous - Flame Failure (during a run)

Typical repair cost £120-250 (including labour)

Engineer required

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

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Potterton models that show the Pulse Red (5 flashes) fault code

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

Source

Potterton Pulse Red (5 flashes) 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