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When I use the electric heater instead of the boiler, the thermostat does show room temp above 19. It’s nice and warm but heating pre thermostat room temp was much warmer.

Flow temp is set at 75. Reaches 74/75

I’ve attached pictures of the connections. Let me know if this is correct please.

I have tried all this. It’s not effective in comparison to using the boiler without the thermostat. Gas Safe man has tried to set the boiler output manually (saturday) and we ran the heating, but it was better on auto setting. His going to come back on Monday so he can ring vaillant and...

Hi I had a Vaillant ecotec 30kw boiler installed in 2020 and it heats the house up really nice. Then I had the same gas safe engineer install a smart salus thermostat. Whenever I use the heating with the thermostat, the radiators get warm but do not warm the house up. If I switch back to manual...