BoilerFaultCodesBaxi Overheat indicator light Fault Code
Also written as OVERHEATINDICATORLIGHT — same fault.
The Baxi Overheat indicator light fault code means: your boiler has switched itself off because it got too hot or experienced a power cut, and it simply needs to be manually reset to start working again.. It appears on 3 Baxi models in our database.
Technical description: The 'overheat' indicator light will be illuminated if the appliance needs resetting. This occurs should the system overheat or due to an interruption to the electricity supply.
DIY fix possible
Locate the overheat reset button on the bottom of the boiler control boxPress the reset button firmlyWait for the boiler to restart and check if the light has gone out
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Baxi models that show the Overheat indicator light fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi Overheat indicator light 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