DIY Doctor UK DIY Forums

i replaced a insulation valve on my heating pipe .because the screw was leaking .but the last radiator will not get hot .all the rest are fine.bled the rad but it is full

Heating system probably needs to be balanced. Try turning down all the return valves, one at a time, till last rad gets hot. Only turn the valves slightly. If your`e not sure which are the returns make sure heating is on and feel both pipes going to the rad and the hottest one will be the flow. Hope this helps.

Pressurised system ?

Probably airlocked, make sure both valves to this radiator are open - turn off all other radiators - it will push through.


htg