How much does it cost to fix Baxi error code 111 R?

Typical repair cost for the Baxi 111 R fault is £100-280 including labour.

111 R High

Baxi 111 R Fault Code

Q: What does the Baxi 111 R fault code mean?

Your boiler has shut down because it has detected it is getting too hot, similar to a safety trip switch on an electrical appliance.

Also written as 111R — same fault.

The Baxi 111 R fault code means: your boiler has shut down because it has detected it is getting too hot, similar to a safety trip switch on an electrical appliance.. It appears on 2 Baxi models in our database.

Technical description: Safety Thermostat Operated (over temperature)

Typical repair cost £100-280 (including labour)

DIY fix possible

Check that your radiator valves are open to allow water to flowEnsure your system pressure is topped up to between 1 and 1.5 barPress the Reset button for five seconds and wait for the boiler to restart

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Baxi models that show the 111 R fault code

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

Source

Baxi 111 R 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 7 July 2026