BoilerFaultCodes E1-69 / E1-70 High
Boiler Fault Code E1-69 / E1-70
Also written as E169E170 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E1-69 / E1-70 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler’s internal computer has encountered a software error while checking its settings, which has caused the system to stop working for safety. (As reported on Daikin D2CND)
Pick your boiler brand for the E1-69 / E1-70 fix
Source
Information for the E1-69 / E1-70 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