Evening All,
Been having on and off issues with a Greenstar CDI classic Combi were the hot water is not heating up but only intermittently.
Some days/ weeks it’s fine and works fine all of the time but on the odd occasion it’s been running cold in the following sequence. It fires up the boiler on water demand, water gets hot, boiler stat goes upto 100 and it knocks off. Sometimes it cycles back to hot and stays hot sometimes it doesn’t stay hot. Sometimes you wait 5 mins try and again and it’s fine. Worth saying that it never repeatedly cycles hot and cold, cycles once or twice and then stays either hot or cold. Also this has been only every so often not everyday.
CH is fine, apart from one radiator not getting hot but they probably need bleeding as first time it’s been on since summer.
Tonight it has done it again but now when the boiler temp gets up to about 90 there’s some horrendous noises coming from the boiler but mostly the associated pipework.
About a month ago I changed the mag filter and it was quite dirty (not sure how much is excessive!) and I think it seemed to be better after that.
Any ideas what this could be before I get a plumber out?
Been having on and off issues with a Greenstar CDI classic Combi were the hot water is not heating up but only intermittently.
Some days/ weeks it’s fine and works fine all of the time but on the odd occasion it’s been running cold in the following sequence. It fires up the boiler on water demand, water gets hot, boiler stat goes upto 100 and it knocks off. Sometimes it cycles back to hot and stays hot sometimes it doesn’t stay hot. Sometimes you wait 5 mins try and again and it’s fine. Worth saying that it never repeatedly cycles hot and cold, cycles once or twice and then stays either hot or cold. Also this has been only every so often not everyday.
CH is fine, apart from one radiator not getting hot but they probably need bleeding as first time it’s been on since summer.
Tonight it has done it again but now when the boiler temp gets up to about 90 there’s some horrendous noises coming from the boiler but mostly the associated pipework.
About a month ago I changed the mag filter and it was quite dirty (not sure how much is excessive!) and I think it seemed to be better after that.
Any ideas what this could be before I get a plumber out?
