n.bazhlekov

Viessmann Vitodens 100-w BK1C (model year 2018-2020) compatibility with Netatmo OpenTherm Thermostat

I bought the thermostat and connected it to the gas boiler, but the heating won’t start. The green light on the relay is on, but there’s no response from the boiler. The cables have been checked an...

• Bearbeitet 26. Januar 2026 10:05
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