How much does it cost to fix boiler error code Indicator light inside box lit?

Typical repair cost for the boiler Indicator light inside box lit fault is £90-160 including labour.

Indicator light inside box lit Emergency

Boiler Fault Code Indicator light inside box lit

Also written as INDICATORLIGHTINSIDEBOXLIT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Indicator light inside box lit appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected that the electrical wiring coming into the unit is connected the wrong way around, which is a safety risk. (As reported on Baxi Solo 3 40 PF)

Pick your boiler brand for the Indicator light inside box lit fix

Baxi Indicator light inside box lit 2 models

Source

Information for the Indicator light inside box lit fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

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