How much does it cost to fix boiler error code C2?

Typical repair cost for the boiler C2 fault is £100-250 including labour.

C2 Low

Boiler Fault Code C2

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code C2 appears across 7 boiler brands and 32 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is having trouble 'talking' to your solar panels or an additional heating control part, which might prevent those specific systems from working correctly. (As reported on Viessmann Vitodens 200)

Pick your boiler brand for the C2 fix

Alpha C2 2 models Ideal C2 10 models Keston C2 8 models Potterton C2 1 model Remeha C2 2 models Viessmann C2 7 models Worcester Bosch C2 2 models

Source

Information for the C2 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