new system with random heating

[1275gt]

Hi i have recently had a new CH system installed (3 storey victorian house) i have had the WB 42cdi boiler, and i am having some trouble with getting the rads set up, the problem i have is one day some are roasting hot but in the other rooms they are luke warm, i had a go at balancing myself and managed to get them very warm bar a few which just needed adjusting. with some fiddling got these nice and hot all but now i'm back to square 1 some get very hot but the majority are warmish checked the pipes 1 end is warm the other stone cold with both valves open !! as far as i know nobody has touched the valves I am at wits end, is this a case of fine tuning or am i missing the bigger picture. all valves have been replaced with new ones and 3 more rads added to the upper floor.

if you need anymnore information just ask i am only just learning myself.

Thanks
Hassan

 

[D_Hailsham]

Read How to balance a CH system

 

[tamz]

Could be just the TRV's shutting down. Everyones perception of warm is different and not all valves are the same
Try removing the heads for a bit and see if it makes any difference.