How much does it cost to fix boiler error code Display not illuminated?

Typical repair cost for the boiler Display not illuminated fault is £80-280 including labour.

Display not illuminated High

Boiler Fault Code Display not illuminated

Also written as DISPLAYNOTILLUMINATED — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Display not illuminated appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has no power going to it at all, meaning the screen is blank and it won't respond to any commands. (As reported on Potterton Envoy)

Pick your boiler brand for the Display not illuminated fix

Potterton Display not illuminated 3 models

Source

Information for the Display not illuminated 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