Hi,
I had a Vaillant 418 installed in my two bedroom flat. Three of the five radiators are quite large. The system is vented.
The boiler has a tendency to get up to its maximum flow temperature, and then stop firing, even though the room thermostat is still calling for heat. Once the temperature has dropped, it fires again, and repeats the process. The flat is not getting warm enough. I don't understand why it does not turn itself down, and keeps producing heat until the room thermostat reaches its set temperature.
Any suggestions?
I had a Vaillant 418 installed in my two bedroom flat. Three of the five radiators are quite large. The system is vented.
The boiler has a tendency to get up to its maximum flow temperature, and then stop firing, even though the room thermostat is still calling for heat. Once the temperature has dropped, it fires again, and repeats the process. The flat is not getting warm enough. I don't understand why it does not turn itself down, and keeps producing heat until the room thermostat reaches its set temperature.
Any suggestions?