DIY Doctor UK DIY Forums

Hope someone can help me.... I have 2 large double rads at the front of the house (11 Rads in total) and they are struggling to warm up, after a while they get luke warm. If I turn a rad off in another part of the house the warm up considerable, yet when i open the closed rad again the heat goes. I am toying with the idea of changing the heating pump from a grudfos 15-50 to a 15-60 to help the water get around the system better.

I have a Worcester condensing boiler fitted about 2 years ago.

the hot water is find so cannot see a problem with the boiler....

If anyone has any advise it would be very helpful

is the pump speed set to III ? it could just be the age of the pump.
A 15-60 pump would help, 11 radiators is quite a large system.

id say the radiators need balancing out.mens restricting the flow to the nearest radiators to enhance flow to ones futher in the system.
Google it,try that first before removing pump

The pump is set on III, the pump was inplace when we moved in 2 years ago, at the time of the boiler change i was told the pump was fine. I have a 3 bedroom house with a large extension on the side that has 3 rads ( 1 in the kitchen and 2 in the dining area)...