Over the last few weeks we have been losing heat to the radiators. The one furthest from the boiler going first. I suspected it was being caused by sludge in the system causing a blockage especially as most of the downstairs radiators were very old and had microbore pipes. I installed brand new radiators and valves and replaced all the pipework with 15mm 'T'd off the 22mm flow and return. Still no joy. The pipes on the flow side would get hot after quite awhile but there was no heat on the return side. Even the return by the boiler remained cold despite the boiler firing up regularly.
I then called out an engineer from Heat Team who we have boiler breakdown cover with. He said the boiler and the pump were working fine and that the system had a blockage.
I have spent the whole day disconnecting every rad and with a rigged up hose pipefrom the outside tap have succesfully flushed every pipe back to the boiler connection. But still no good!.
I even tried shutting every rad in the house off bar one of the new ones
It did get hot eventually about 3 times longer than it used to take for all the rads to get piping hot, but the return pipe barely heated up at all and by the boiler it was still cold.
I can't see that it's possibe to have a blockage when I have confirmed that every pipe is running clear back to the boiler and if it's not the pump failing I am at a complete loss what to try next.
Any ideas or advise would be greatly appreciated.
My boiler is a baxi 105 HE
I then called out an engineer from Heat Team who we have boiler breakdown cover with. He said the boiler and the pump were working fine and that the system had a blockage.
I have spent the whole day disconnecting every rad and with a rigged up hose pipefrom the outside tap have succesfully flushed every pipe back to the boiler connection. But still no good!.
I even tried shutting every rad in the house off bar one of the new ones
It did get hot eventually about 3 times longer than it used to take for all the rads to get piping hot, but the return pipe barely heated up at all and by the boiler it was still cold.
I can't see that it's possibe to have a blockage when I have confirmed that every pipe is running clear back to the boiler and if it's not the pump failing I am at a complete loss what to try next.
Any ideas or advise would be greatly appreciated.
My boiler is a baxi 105 HE