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Any ideas folks as to what could be causing my inlaws combi to go hot and cold on the hot water and now it is heating the rads when heating HW too. The boiler is no more than 3 years old sorry not sure of exact model. Thanks Mike.

I am about to change the 3 way valve on our system as each time the hot water is heated the rads get hot. i'm quite sure it has been corroded by hard water and so it's likely that there will be scale in other parts of the system as we don't seem to get much more than a few inches of bath water...

A friend had a new Gloworm combi boiler fitted 6 weeks ago but says that when the heating comes up to temp and cuts out it is not until the room in which the room stat is in becomes quite cool before the heating cuts back in again. He has set the stat at 18deg and the rad in this room has a TRV...

I have recently replaced the float valve in my tank for the hot water side of our system i installed a high pressure one as we have quite strong cold water pressure but when ever we run a bath the valve pulses as it refills rather than at a smooth constant fill rate ,i have tried closing the...

I have a problem with the boiler in our house it's a Potterton Netaheat 10/16 probably original which would make it about 28 yrs old and has behaved itself so far but in the past few days the radiators have starting to heat up very quickly in about 20 mins all the rads are so hot you can hardly...