no hot water unless central heating on

Joined
26 Dec 2007
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Location
Lancashire
Country
United Kingdom
I have a SIME combi boiler, approx 5 years old, leaked a few times but mostly ok. However, on xmas eve we noticed water was cold, unless we turned CH on. no idea what it could be. A few days before I did mess with timer, trying to figure out how to use it. Anybody any ideas?
 
sorry chris, i really am a DIYNOT, and female,!! What is a diaphragm and where will i find it? Presumably it is inside the boiler covering
 
i am also having same problem with no hot water unless ch is on. i have an ALPHACB24/28 bolier only 3 yrs old... help!!!
 
Should start a new thread for your combi!

Again could be flow switch that sits just to the left of the diaphragm unit or the diaphragm or the DV stuck mid position.
 

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