How much does it cost to fix boiler error code 432?

Typical repair cost for the boiler 432 fault is £120-200 including labour.

432 Low

Boiler Fault Code 432

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 432 appears across 2 boiler brands 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's external outdoor temperature sensor is either disconnected or faulty, meaning the system doesn't know how cold it is outside to adjust its heat settings. (As reported on ECA FELiS FL 50 HM)

Pick your boiler brand for the 432 fix

Baxi 432 1 model ECA 432 1 model

Source

Information for the 432 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 7 July 2026