How much does it cost to fix boiler error code E28?

Typical repair cost for the boiler E28 fault is £90-160 including labour.

E28 Medium

Boiler Fault Code E28

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code E28 appears across 6 boiler brands and 40 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has lost the ability to measure the temperature of your hot water, which usually means it will stop providing hot water or provide it at an inconsistent temperature. (As reported on Potterton Promax HE Store)

Pick your boiler brand for the E28 fix

Baxi E28 16 models Biasi E28 2 models Keston E28 1 model Main E28 6 models Potterton E28 14 models Vokera E28 1 model

Source

Information for the E28 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 31 August 2026