unvented cylinder

At the outset let me say that I am not looking for self help advice: this is clearly a job for a professional. I have a 250L OSO 20RD unvented cylinder. It has been installed for 15 years. It serves two Bristan thermostatic showers which recently have started to run cold. There is no pressure...

Hello, I have a Combi Boiler (Vaillant Ecotec Plus 428) and an Unvented Cylinder (Vaillant uniSTOR VIH GB 180s). Since yesterday we have no more hot water in the house, it comes out cold or luke warm. But the heating works fine. When a hot water tap is fully opened, the boiler reads S.30 (no...

Hi I am about to find someone to service our megaflo unvented system and boiler. We feel that there are a couple of problems 1. the water does not feel as hot as it should, I can easily let it run over my hands (boiler set to max) and 2. wife cant have a 20 minute shower without the hot water...

Hi all, I have searched the forum but I cannot find this issue and I have contacted the manufacturer but it is Saturday and they are not back until Monday. System: Premier Plus Unvented Cyclinder with Horstmann Electronic 7 controller. We have had a few power cuts over the last couple of...

I have an unvented heating system with a 300L Gledhill StainlessLite cylinder that somtimes emits a very loud cracking sound (https://clyp.it/4ov2ozv0) when hot water is drawn from a tap. Everything works fine except for this sound which can be unnerving for those who don't expect to hear it...

Hello all - A loud rattling/buzzing sound has developed in the pipes next to our hot water/central heating cylinder. The sound is locating near to the lower Honeywell valve in the attached picture. Interestingly the sound stops when I turn on the hot water alongside the central heating. Hot...

I have a an electric unvented cylinder hot water boiler, the tundish has started dripping water constantly. Is this dangerous? should I switch the boiler off until I can get it serviced? thanks for the advice Jon Untitled by jon21021985 posted 9 Sep 2013 at 12:58 AMUntitled by jon21021985...