I
icezebra
So, recently had the Vaillant 350f thermostat replaced with a Nest and I'm left with a problem I can't wrap my head around. Boiler is Vaillant ecoTec 831 Plus and is only a couple of years old.
With the Vaillant thermostat, the flow temperature would vary based on room temp vs set temp, but also quite regularly reach the max flow temp of 75C. Now with the Nest, which as far as I can tell is now contact closure only, the flow temperature never goes above 55C.
I can't see anything in the Nest settings about controlling flow temp, and if it's a straight switch then I can't imagine how the Nest's settings would impact it. The only thing I can think is that there's a boiler setting buried in a menu to do with this.
Tearing clumps of hair out. The house is noticeably colder as some radiators now just don't heat up as much. And rather than 30 mins to take the room with the Nest in from 19C to 21C, it now take hours; and doesn't even get there. Haven't even managed to get the room above 20C.
Help! Anyone have any thoughts? I'm not GSR so am not going to play with the innards of the boiler, but following a chat with a Vaillant installer - who had no idea, I'm trying to get an idea what this might be (and hopefully buried in settings) before I pay for someone to come round.
(Have been searching for previous questions ref this issue to no avail.)
With the Vaillant thermostat, the flow temperature would vary based on room temp vs set temp, but also quite regularly reach the max flow temp of 75C. Now with the Nest, which as far as I can tell is now contact closure only, the flow temperature never goes above 55C.
I can't see anything in the Nest settings about controlling flow temp, and if it's a straight switch then I can't imagine how the Nest's settings would impact it. The only thing I can think is that there's a boiler setting buried in a menu to do with this.
Tearing clumps of hair out. The house is noticeably colder as some radiators now just don't heat up as much. And rather than 30 mins to take the room with the Nest in from 19C to 21C, it now take hours; and doesn't even get there. Haven't even managed to get the room above 20C.
Help! Anyone have any thoughts? I'm not GSR so am not going to play with the innards of the boiler, but following a chat with a Vaillant installer - who had no idea, I'm trying to get an idea what this might be (and hopefully buried in settings) before I pay for someone to come round.
(Have been searching for previous questions ref this issue to no avail.)