On Dec 2, 7:29*pm, "Ben Short" wrote:
Well the plumber hasn't come yet to see to the rad I cannot bleed. However,
I left the heating on today for 3 hours and only in the last hour did the
rads get warm/hot. 2 of them are still stone cold the others warm to hot.
But so long to get warm. Could it be the pump at fault here? Thanks

Could be simply not enough water in the system, when you bleed the
highest radiator does water come out, what is the pressure. I have a
leak somewhere, every year I fill it a bit or the highest radiator
would be all air.