DIY Doctor UK DIY Forums

Hello,

Since having a leaking radiator changed, the heating pump will only come on when a hot water tap is run. The radiators do get hot but as soon as they are, the pump stops and they cool down again. Why could this be? Before the radiator was changed (which involved draining the system) everything worked fine.

Please help!

yeah it might help if you gave a bit more detail on what boiler you have and what type of hot water system.