How much does it cost to fix boiler error code AL28?

Typical repair cost for the boiler AL28 fault is £90-180 including labour.

AL28 High

Boiler Fault Code AL28

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code AL28 appears across 1 boiler brand and 8 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 that the water coming back from your radiators is hotter than the water going out, which usually means the water isn't circulating correctly or a sensor is faulty. (As reported on Vokera Mynute 10E)

Pick your boiler brand for the AL28 fix

Vokera AL28 8 models

Source

Information for the AL28 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