How much does it cost to fix Potterton error code Pulse Red (3 flashes)?

Typical repair cost for the Potterton Pulse Red (3 flashes) fault is £150-300 including labour.

Pulse Red (3 flashes) Emergency

Potterton Pulse Red (3 flashes) Fault Code

Q: What does the Potterton Pulse Red (3 flashes) fault code mean?

Your boiler has detected that it is dangerously overheating and has automatically shut down to prevent damage or a safety hazard.

Also written as PULSERED3FLASHES — same fault.

The Potterton Pulse Red (3 flashes) fault code means: your boiler has detected that it is dangerously overheating and has automatically shut down to prevent damage or a safety hazard.. It appears on 2 Potterton models in our database.

Technical description: Continuous - Dry Fire Sensor Fault/Overheat

Typical repair cost £150-300 (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 (3 flashes) fault code

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

Source

Potterton Pulse Red (3 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