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Hi
I have a Potterton Heatmax Combi 28 HE that was installed in 2014.
Over the past year or so it has slowly had more trouble heating distant radiators.
It was serviced in February 2022 and given a clean bill of health, however since then it now only heats the two nearest radiators and at a much lower temperature than the flow from the boiler.
I suspect the pump, but so far the one quote I had to replace it was for £600 which seems absurd ( Part Number: 7722642 ), and that's £600 that could just go towards getting a new boiler, considering it's already over 8 years old.
The pump still makes a noise like it's doing something but, the other radiators aren't getting warm and most radiators don't even feel warm at the flow, never mind hot.
One thing I noticed today is that the one radiator inside the main part of the house that gets heat is currently much colder at the bottom than at the top. I'm not sure if this is indicative of a restricted/blocked return, dying pump or what.
(the only other radiator that is capable of getting heat is one in the extension in the foyer by the back door, it's a small 1'x1' single panel and I've closed both the flow and the return on it (it's not part of the main loop), to try and get the one useful radiator to provide more heat to the house).
Given the callout charge, I'm reluctant to pay up for results that aren't a sure thing before doing everything I can myself to try and diagnose the problem
My own plumbing experience is dated at best, my Father was a plumber/gas fitter when I was growing up, and I spent a lot of years doing jobs with him, so I've replaced a lot of boilers, radiators, and your typical run of the mill jobs, including doing most of the heavy lifting getting this current one mounted 8 years ago, but that'd have been the only plumbing work I've done in over 20 years, and with my father no longer able to advise/supervise, I'd rather stick to diagnostics and pay a professional to do a good job (that latter part hasn't always worked out over the years, but I live in hope.
Any assistance is appreciated.
I have a Potterton Heatmax Combi 28 HE that was installed in 2014.
Over the past year or so it has slowly had more trouble heating distant radiators.
It was serviced in February 2022 and given a clean bill of health, however since then it now only heats the two nearest radiators and at a much lower temperature than the flow from the boiler.
I suspect the pump, but so far the one quote I had to replace it was for £600 which seems absurd ( Part Number: 7722642 ), and that's £600 that could just go towards getting a new boiler, considering it's already over 8 years old.
The pump still makes a noise like it's doing something but, the other radiators aren't getting warm and most radiators don't even feel warm at the flow, never mind hot.
One thing I noticed today is that the one radiator inside the main part of the house that gets heat is currently much colder at the bottom than at the top. I'm not sure if this is indicative of a restricted/blocked return, dying pump or what.
(the only other radiator that is capable of getting heat is one in the extension in the foyer by the back door, it's a small 1'x1' single panel and I've closed both the flow and the return on it (it's not part of the main loop), to try and get the one useful radiator to provide more heat to the house).
Given the callout charge, I'm reluctant to pay up for results that aren't a sure thing before doing everything I can myself to try and diagnose the problem
My own plumbing experience is dated at best, my Father was a plumber/gas fitter when I was growing up, and I spent a lot of years doing jobs with him, so I've replaced a lot of boilers, radiators, and your typical run of the mill jobs, including doing most of the heavy lifting getting this current one mounted 8 years ago, but that'd have been the only plumbing work I've done in over 20 years, and with my father no longer able to advise/supervise, I'd rather stick to diagnostics and pay a professional to do a good job (that latter part hasn't always worked out over the years, but I live in hope.
Any assistance is appreciated.
