Hope someone can help as we have exhausted every avenue (and most plumbers) in our area.
In June this year we had 2 new chrome towel rails fitted to our oil fired central heating system; one worked fine, the other one did not. The plumber who fitted them drained the system down but it would not refill as the header tank valves were scaled up. He replaced these plus another valve to vent the central heating pump and the heating started to work again (with the exception of the second towel rail and the radiator in the lounge - which I gather is the closest to the boiler). He promised to come back but did not. I then contacted another plumber who suggested that we flush the system out completely as there may be sludge and air in the radiators. As he was going to drain down the system I asked him to replace 2 of the "older" style radiators while he was at it. He did this and then put in Sentinel 200, flushed the system through and then put in an inhibiter. After 3 or 4 hours of going back and forth from boiler to radiators throughout the house he managed to get all of them working - albeit that 2 of them (the towel rail and the one in the lounge) were barely warm while the others were red hot. He said the system needed balancing and came back another day. Again, after another few hours he managed to get them all working but still the same 2 were barely warm. He has turned up the thermostat to 30 degrees, the boiler is on maximum and the pump is on its highest speed. The main problem is that although the radiators work whilst the plumber is there (and while it is switched on) the following day only one or two radiators are working properly - the heat just seems to fade away! This latest plumber says he has done everything possible and that he cannot understand why the system is not working properly. Now only 2 or 3 radiators out of 9 are hot, the remainder are stone cold. We have now contacted another plumber who has suggested replacing the valves on the radiators that don't work (although one of the rads, the towel rail, has brand new valves) and also putting in a new pump. Honestly, at this rate, we will end up with a completely new central heating system - just waiting for someone to suggest we replace our boiler aswell. Does anyone have any suggestions at all before I go ahead and replace the pump?
In June this year we had 2 new chrome towel rails fitted to our oil fired central heating system; one worked fine, the other one did not. The plumber who fitted them drained the system down but it would not refill as the header tank valves were scaled up. He replaced these plus another valve to vent the central heating pump and the heating started to work again (with the exception of the second towel rail and the radiator in the lounge - which I gather is the closest to the boiler). He promised to come back but did not. I then contacted another plumber who suggested that we flush the system out completely as there may be sludge and air in the radiators. As he was going to drain down the system I asked him to replace 2 of the "older" style radiators while he was at it. He did this and then put in Sentinel 200, flushed the system through and then put in an inhibiter. After 3 or 4 hours of going back and forth from boiler to radiators throughout the house he managed to get all of them working - albeit that 2 of them (the towel rail and the one in the lounge) were barely warm while the others were red hot. He said the system needed balancing and came back another day. Again, after another few hours he managed to get them all working but still the same 2 were barely warm. He has turned up the thermostat to 30 degrees, the boiler is on maximum and the pump is on its highest speed. The main problem is that although the radiators work whilst the plumber is there (and while it is switched on) the following day only one or two radiators are working properly - the heat just seems to fade away! This latest plumber says he has done everything possible and that he cannot understand why the system is not working properly. Now only 2 or 3 radiators out of 9 are hot, the remainder are stone cold. We have now contacted another plumber who has suggested replacing the valves on the radiators that don't work (although one of the rads, the towel rail, has brand new valves) and also putting in a new pump. Honestly, at this rate, we will end up with a completely new central heating system - just waiting for someone to suggest we replace our boiler aswell. Does anyone have any suggestions at all before I go ahead and replace the pump?