How much does it cost to fix boiler error code L.022?

Typical repair cost for the boiler L.022 fault is £80-150 including labour.

L.022 High

Boiler Fault Code L.022

Also written as L022 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code L.022 appears across 1 boiler brand and 3 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 there is not enough water flowing through your heating system, which usually means the pressure is too low or a valve is closed. (As reported on Vaillant ecoTEC Plus 832)

Pick your boiler brand for the L.022 fix

Vaillant L.022 3 models

Source

Information for the L.022 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