New Heat pump user Can someone look at this graph and tell me what is happening?

[Ringi]

@mpooley

The problem I having at the moment is that the underfloor is working well and is happily plodding along at about 28c but they have sized the rads upstairs for 45c and it’s too cold upstairs now the temperatures are dropping. To be honest I’m not sure how to proceed from here? it’s going to be painful to have to replace all brand new rads and towel rails

See DIY Controller for radiator fans