Recent content by smida

Apologies for not answering, yes the system was fitted by a qualified person. Initially the whole system was installed about 5-6 years ago. I agree that to purchase a lined cylinder with cathodic protection instead of a stainless steel one was a cost saving. As for the boiler, again cost was a...

Bypass is fitted. As it appears that this fault only happens when the system has had chance to cool for several hours and then only when DHW calls for heat, could there be some fault with a temperature sender on the DHW side of the boiler. As I mentioned before, once you flick the...

Thanks for response, but the boiler has been working fine for the last 20 months. At first i wondered if the mid port valve was somehow freezing as it is in the garage and it was minus 12 the other night but last night wasn't that cold and it did it again.

On several occasions during this cold weather I have been woken by a banging noise from my boiler and also steam coming out of the air vent. After several nights of this I have done a bit of detective work and can deduce the following. The central heating isn't calling for heat but the...