thank you all for your help and advice.
I finally have all the heaters working again. I have roughly balanced them until i get a hold of sum thermometers.
Any idea how much they retail for in the UK and the best websites/shops to buy/hire from?
the boiler was installed two years ago and it has worked properly since.
it started giving me a headache about 2 weeks ago when I switched it on after a long summer!
I am closing the hot rads to see if tht works.
thnx
probly an amateur topic for the experts on here!!
I have;
Main HE24 Boiler (NOT combi but the otha one!)
Room thermostat
4 Radiators upstairs with TRVs
1 Radiator Downstairs with TRVs
Grundfos 15/60 pump
Siemens 3 way valve (newly installed)
Three upstairs rads closest to the pump...