Sorry if this has been asked before I have read a few responses to similar questions but I want to ask.
I have a combi alpha cd25c, I don't the history of as it was installed before I moved here. After noticing on of the downstairs radiators was completely cold except at the top (it is top fed) I took off the radiator flushed out all the black sludge and reattached as refilled adding some sludge cleaner. I left this in for a week then drained down the system. I took the opportunity to replace a seized stopcock whilst I was at it. I added some boiler silencer refilled system. Everything is working, except te DHW doesn't seem as hot as you have to do the old trick I letting it run slow.
I understand it could be sludge in the secondary heat exchanger?
I was wondering if it is just increased flow after changing stopcock but in kitchen tap it is noticeably cooler but not terrible, I am concerned as I am soon to be running a thermo mixer shower off the boiler and need it at its best for that.
I dot currently have a boiler cover policy , should I take one out (would it be covered) or call a local heating engineer? Does it need powerflushing? Could I do anything myself ? I have caused it?
Really appreciate any help with this.
I have a combi alpha cd25c, I don't the history of as it was installed before I moved here. After noticing on of the downstairs radiators was completely cold except at the top (it is top fed) I took off the radiator flushed out all the black sludge and reattached as refilled adding some sludge cleaner. I left this in for a week then drained down the system. I took the opportunity to replace a seized stopcock whilst I was at it. I added some boiler silencer refilled system. Everything is working, except te DHW doesn't seem as hot as you have to do the old trick I letting it run slow.
I understand it could be sludge in the secondary heat exchanger?
I was wondering if it is just increased flow after changing stopcock but in kitchen tap it is noticeably cooler but not terrible, I am concerned as I am soon to be running a thermo mixer shower off the boiler and need it at its best for that.
I dot currently have a boiler cover policy , should I take one out (would it be covered) or call a local heating engineer? Does it need powerflushing? Could I do anything myself ? I have caused it?
Really appreciate any help with this.