How much does it cost to fix Baxi error code Red neon?

Typical repair cost for the Baxi Red neon fault is £90-180 including labour.

Red neon High

Baxi Red neon Fault Code

Q: What does the Baxi Red neon fault code mean?

Your boiler has switched itself off because it has reached an unsafe temperature and needs to cool down and be reset.

Also written as REDNEON — same fault.

The Baxi Red neon fault code means: your boiler has switched itself off because it has reached an unsafe temperature and needs to cool down and be reset.. It appears on 1 Baxi model in our database.

Technical description: Cut-off is indicated by illumination of the red neon. This occurs when the overheat cut-off device has operated.

Typical repair cost £90-180 (including labour)

DIY fix possible

Switch off the electricity supply to the boiler for a few secondsTurn the electricity supply back onTurn the boiler thermostat knob fully anticlockwise to the 'OFF' positionWait 10 seconds, then turn the knob back to your desired temperature setting

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Baxi models that show the Red neon fault code

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

Solo 3 40 PF Repair: £90-180

Source

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

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