How much does it cost to fix Potterton error code Flashing Red?

Typical repair cost for the Potterton Flashing Red fault is £120-200 including labour.

Flashing Red High

Potterton Flashing Red Fault Code

Q: What does the Potterton Flashing Red fault code mean?

Your boiler has become too hot and has automatically turned itself off as a safety precaution to prevent damage.

Also written as FLASHINGRED — same fault.

The Potterton Flashing Red fault code means: your boiler has become too hot and has automatically turned itself off as a safety precaution to prevent damage.. It appears on 1 Potterton model in our database.

Technical description: Overheat thermostat condition (requires manual re-setting)

Typical repair cost £120-200 (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 Flashing Red fault code

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

Prima 30B Repair: £120-200

Source

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

Potterton Prima 30B manual (PDF)

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026