How much does it cost to fix Baxi error code neon flashing (Overheat)?

Typical repair cost for the Baxi neon flashing (Overheat) fault is £90-180 including labour.

neon flashing (Overheat) High

Baxi neon flashing (Overheat) Fault Code

Q: What does the Baxi neon flashing (Overheat) fault code mean?

Your boiler has become too hot and has shut itself down as a safety precaution to prevent damage.

Also written as NEONFLASHINGOVERHEAT — same fault.

The Baxi neon flashing (Overheat) fault code means: your boiler has become too hot and has shut itself down as a safety precaution to prevent damage.. It appears on 1 Baxi model in our database.

Technical description: Overheat thermostat operated. Investigation necessary, turn selector to reset.

Typical repair cost £90-180 (including labour)

DIY fix possible

Check that your radiator valves are open and not turned to offTurn the selector switch to the 'R' (Reset) position for five seconds, then turn it back to your desired settingEnsure there is enough water pressure in the system by checking the pressure gauge

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Baxi models that show the neon flashing (Overheat) fault code

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

Bahama 80e / 105e Repair: £90-180

Source

Baxi neon flashing (Overheat) 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