BoilerFaultCodesWhat the manual says
Manufacturer manualNo communication with the PCB Communication fault between display and PCB in the electronics box
From this model's manual
Verified against the Vaillant/Vaillant Ecotec Plus 612 4104460 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 77 fault codes on the ecoTEC
Seeing a different code? Every code this model can display, in one place.
D.17F.00F.01F.02F.03F.10F.11F.12F.13F.20F.22F.23F.24F.25F.26F.27F.28F.29F.32F.35F.42F.49F.52F.53F.54F.56F.57F.61F.62F.63F.64F.65F.67F.68F.70F.71F.72F.73F.74F.75F.76F.77F.78F.83F.84F.85F.91F.92F.93S.10S.11S.13S.14S.15S.16S.17S.20S.21S.22S.23S.24S.25S.26S.27S.28S.30S.31S.32S.34S.41S.42S.53S.54S.96S.97S.98