BoilerFaultCodesWhat the manual says
Manufacturer manualDHWmode:Burneron
From this model's manual
Verified against the Vaillant/Vaillant Ecotec Plus 615 installation & service manual, page 38.
What causes this fault?
This is actually not a fault, but a status code indicating that your boiler is currently firing to heat your tap water. It appears when someone turns on a hot tap or if the boiler is pre-heating its internal tank to ensure hot water is ready when you need it. Once the demand for hot water stops, this code will naturally change to a different status.
DIY fix possible
This fault may be fixable without an engineer. Check your manual first.
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Related fault codes
All 96 fault codes on the ecoTEC Plus 615
Seeing a different code? Every code this model can display, in one place.
cond.10d.11d.13d.17d.18d.19d.20d.22d.23d.25d.27d.28d.33d.34d.35d.36d.40d.41d.47d.50d.51d.58d.60d.61d.64d.65d.67d.68d.69d.70F.0F.1F.10F.11F.13F.20F.22F.23F.24F.27F.28F.29F.32F.49F.61F.62F.63F.64F.65F.67F.70F.71F.72F.75F.76F.77F.78F22F70P.0P.1P.2P.3P.4P.5P.6S.0S.1S.2S.3S.4S.5S.6S.7S.8S.20S.21S.22S.23S.25S.26S.27S.28S.30S.31S.32S.34S.36S.41S.42S.53S.54S.96S.98