How much does it cost to fix boiler error code HP Comms No illumination?

Typical repair cost for the boiler HP Comms No illumination fault is £90-180 including labour.

HP Comms No illumination High

Boiler Fault Code HP Comms No illumination

Also written as HPCOMMSNOILLUMINATION — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code HP Comms No illumination appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your smart thermostat is unable to talk to your boiler because the wired connection between them has been lost or disconnected. (As reported on Ideal Halo Air RF WI FI 2 Zone)

Pick your boiler brand for the HP Comms No illumination fix

Ideal HP Comms No illumination 1 model

Source

Information for the HP Comms No illumination 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