PCB 38 CH light flashing Medium

Boiler Fault Code PCB 38 CH light flashing

Also written as PCB38CHLIGHTFLASHING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code PCB 38 CH light flashing 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 boiler has detected a communication issue or a component failure within its central heating temperature sensing system, meaning it cannot accurately monitor the water temperature for your radiators. (As reported on Ideal Classic FF)

Pick your boiler brand for the PCB 38 CH light flashing fix

Ideal PCB 38 CH light flashing 1 model

Source

Information for the PCB 38 CH light flashing 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