tried that and no difference and pump not making noise. this happened earlier today as well and I let everything cool down turned back on and again it worked (pump made humming noise) until everything came up to temperature then stopped (this of course could be a coincidence) but thought worth...
Hi I hope someone can help.
I have just turned on the heating for the winter and the downstairs rads were not getting hot. I checked online and it suggested turning off the trv on the upstairs rads and turn the pump to max to push water through.
This worked and the downstairs rads got...