How much does it cost to fix Potterton error code Neon 25?

Typical repair cost for the Potterton Neon 25 fault is £120-250 including labour.

Neon 25 Emergency

Potterton Neon 25 Fault Code

Q: What does the Potterton Neon 25 fault code mean?

Your boiler has automatically shut down because it has detected dangerously high temperatures, effectively acting as a safety cut-out to prevent damage.

Also written as NEON25 — same fault.

The Potterton Neon 25 fault code means: your boiler has automatically shut down because it has detected dangerously high temperatures, effectively acting as a safety cut-out to prevent damage.. It appears on 1 Potterton model in our database.

Technical description: Safety Thermostat Activated (Boiler or Flue)

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 Neon 25 fault code

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

Performa 24 Repair: £120-250

Source

Potterton Neon 25 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