Hi All,
I have had a quick search and can't find anything exactly like this so here goes!
We bought a house last year which had a Microgenius 23 combi boiler fitted and it worked perfectly - full flow hot showers and perfect heating.
We went away in March and had a new kitchen fitted, which involved moving a radiator, and upon our return, we had problems with the hot water instantly. When the pressure is low (i.e quarter turn on the shower) the water is fine, but when you open the bath tap or shower fully now, the water gets hot after about 10 seconds, but then goes tepid and stays that way. Before this I could have the showr/bath tap on full flow and the water was piping hot.
I have a friend of a friend who is a plumber, so I called him and he suggested it could be the diverter valve diaphragm, but when he came down a few days later, a few other guys he knew said it was more likely to be the heat exchange (we are in South Bucks so quite a hard water area) so he stripped the boiler and cleaned this out (it was quite badly scaled).
This made no difference at all.
A neighbour who had a similar problem said that he had changed his diverter valve (the diaphragm in his old one was perished) and this rectified the problem, so I bought a new valve from onlineplumbingspares and got the toolkit out!
I was surprised to see that the new valve was literally just that - the brasswork, and no new diaphragm etc etc. I carefully migrated the old temp sensors (x2), diaphragm/spring and valve acuator across, and fired the old girl up expecting great things.....
...however....
the low pressure water is now much hotter than before (feels at least 7-10 degrees hotter) but the high pressure, open shower/bath tap is exactly as before, i.e hot initially, and then tepid....
The diaphragm looked OK on inspection - a little 'baggy' perhaps but no tears or leaks, but I am now at a loss as to what to try next!
I'd change the boiler but we will be moving in 6 months so I'd rather keep this one going if I can!
Any ideas chaps?!
Thanks
I have had a quick search and can't find anything exactly like this so here goes!
We bought a house last year which had a Microgenius 23 combi boiler fitted and it worked perfectly - full flow hot showers and perfect heating.
We went away in March and had a new kitchen fitted, which involved moving a radiator, and upon our return, we had problems with the hot water instantly. When the pressure is low (i.e quarter turn on the shower) the water is fine, but when you open the bath tap or shower fully now, the water gets hot after about 10 seconds, but then goes tepid and stays that way. Before this I could have the showr/bath tap on full flow and the water was piping hot.
I have a friend of a friend who is a plumber, so I called him and he suggested it could be the diverter valve diaphragm, but when he came down a few days later, a few other guys he knew said it was more likely to be the heat exchange (we are in South Bucks so quite a hard water area) so he stripped the boiler and cleaned this out (it was quite badly scaled).
This made no difference at all.
A neighbour who had a similar problem said that he had changed his diverter valve (the diaphragm in his old one was perished) and this rectified the problem, so I bought a new valve from onlineplumbingspares and got the toolkit out!
I was surprised to see that the new valve was literally just that - the brasswork, and no new diaphragm etc etc. I carefully migrated the old temp sensors (x2), diaphragm/spring and valve acuator across, and fired the old girl up expecting great things.....
...however....
the low pressure water is now much hotter than before (feels at least 7-10 degrees hotter) but the high pressure, open shower/bath tap is exactly as before, i.e hot initially, and then tepid....
The diaphragm looked OK on inspection - a little 'baggy' perhaps but no tears or leaks, but I am now at a loss as to what to try next!
I'd change the boiler but we will be moving in 6 months so I'd rather keep this one going if I can!
Any ideas chaps?!
Thanks
