BoilerFaultCodesWhat the manual says
Manufacturer manualAutomatic test programme: Water pressure sensor, heating and hot water request blocked.
From this model's manual
Verified against the Vaillant/Vaillant Ecotec Sustain installation & service manual, page 50.
DIY fix possible
Check the digital or analog pressure gauge to ensure it is between 1.0 and 1.5 barIdentify if the system has recently been refilled, as the boiler may be performing a self-testWait for the cycle to finish as the boiler usually resumes normal operation within a few minutesReset the boiler if the code remains on the screen for more than 15 minutes
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Related fault codes
All 153 fault codes on the ecoTEC sustain
Seeing a different code? Every code this model can display, in one place.
conConnectiond.00d.01d.02d.04d.05d.06d.07d.08d.09d.10d.11d.13d.14d.15d.16d.17d.18d.20d.21d.22d.23d.25d.27d.28d.33d.34d.35d.36d.39d.40d.41d.43d.45d.47d.50d.51d.58d.60d.61d.64d.65d.66d.67d.68d.69d.71d.73d.75d.77d.80d.81d.82d.83d.84d.85d.88d.90d.91d.93d.94d.95d.96ErrF.00F.01F.1F.10F.11F.13F.20F.22F.23F.24F.27F.28F.29F.32F.46F.49F.61F.62F.63F.64F.65F.67F.68F.70F.71F.72F.73F.74F.75F.77F.83F.84F.85F.87F.88F.89F.97F22F70P.00P.01P.02P.06S.00S.01S.02S.2S.03S.3S.04S.4S.05S.06S.6S.07S.08S.8S.10S.11S.13S.14S.15S.16S.17S.20S.21S.22S.23S.24S.25S.26S.27S.28S.30S.31S.32S.34S.39S.42S.53S.54S.88S.91S.96S.98S.108S.109