BoilerFaultCodesWhat the manual says
Manufacturer manualThe heating mode is active and the unit carries out an automatic drift adaptation of the control electrode in order to offset the ageing of the electrode.
From this model's manual
Verified against the Vaillant/Vaillant Vaillantpro 0020308121 05 Ecotecplus Storage Combi Installation installation & service manual.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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All 166 fault codes on the ecoTEC plus 940
Seeing a different code? Every code this model can display, in one place.
F.000F.001F.002F.003F.010F.011F.012F.013F.020F.022F.023F.024F.025F.027F.028F.029F.032F.035F.040F.042F.044F.047F.049F.057F.061F.062F.063F.064F.065F.067F.068F.070F.071F.072F.074F.075F.076F.077F.078F.080F.081F.083F.084F.085F.087F.088F.089F.090F.092F.095F.096F.097F.105F.194F.195F.196F.317F.318F.320F.321F.322F.323F.324F.325F.326F.327F.330F.334F.336F.337F.338F.342F.343F.344F.347F.363F.707F.905I.003I.020I.144L.016L.022L.025L.032L.095L.096L.097L.105L.144L.194L.195L.196L.319L.320L.322L.343N.013N.027N.032N.089N.095N.096N.097N.100N.144N.194N.270N.317N.319N.324N.343S.000S.001S.002S.003S.004S.005S.006S.007S.008S.010S.011S.012S.013S.014S.015S.016S.017S.019S.020S.021S.022S.023S.024S.025S.026S.027S.028S.029S.030S.031S.032S.034S.039S.041S.042S.054S.057S.059S.088S.091S.092S.093S.096S.097S.098S.109S.175S.199S.326S.328S.335S.341S.599