How to mend ... Sealed Water System

Grant outdoor combi 90 v3?

My sealed system loses pressure when I run the hot water. When boiler cuts in the system builds up pressure ag... [Read more]

worcester 24i combi20-30 minute delay between demand and ignition?

I have a worcester 24i providing central heating and indirect heat to the hot water tank in a sealed system co... [Read more]

Warmflow leak?

I have a Warmflow Combi oil boiler, c. 8 years old, but not much used. I have drained the cent. heating syste... [Read more]

Why do I need to top up the pressure in the CH each time I turn it off?

Why do I have to top up the water pressure in the CH boiler every time I turn it off. The pressure falls to be... [Read more]

How do I find where my modena 80E loses water?

I have a Modena 80E boiler and the pressure drops on the sealed system. I top it up to 1bar as the manual says... [Read more]

Ravenheat Little Star LS100 problem?

I have had a few problems with this boiler for the last year in that the DHW is only hot when it feels like it... [Read more]

High pressure on Glow worm 30cx boiler?

The pressure instead of remaining constant, as it is a sealed system, is increasing by approx 0.1 bar per day.... [Read more]

Boiler expansion pipe blowing back?

Hi! I have a two-storey house, the boiler was originally on the ground floor. Seven years ago the boiler was r... [Read more]

Combi Boiler CH ok but no HW?

I have an old oil-fired Firebird C20 70K combi boiler, that provides CH and DHW to my house which has a single... [Read more]

How do I fix water hammer just started on closure of hot water valve?

My central heating system (vented, not sealed - boiler replaced about 4 years ago) has suddenly developed a lo... [Read more]

hot water but no heating?

hello. i have a worcester danesmoor oil boiler, its a sealed system, honeywell st699b programer honeywell V... [Read more]

My sealed heating system is losing water but no apparent leaks?

Hi! My sealed central heating system loses one bar water pressure in two days. I have concrete floors with pip... [Read more]

Locating an underfloor water leak?

Hi! My central heating system is of the sealed pressurised type and I am losing about one bar of water pressur... [Read more]

Valliant eco plus losing pressure - real mystery?

Hi all, My boiler keeps losing pressure on a daily basis and has been doing so for over 2 months. At first... [Read more]

How to top-up a Glow-worm Micron domestic boiler?

Asking this question for a distant elderly relative, before she gets ripped off by yet another crooked plumber... [Read more]

How to fill a myson boiler?

Hi I have a Myson Apollo 30b boiler which continually trips the electricity circuit after 5 - 10 mins of us... [Read more]

how do you increase worcester 15/19 heatslave presssure?

I have a 15/19 heatslave not sure of age as only moved into property month ago. Lock out on this morning. Can ... [Read more]

How can I get my Glow Worm Ultimate 100FF boiler working?

I have a sealed water sytstem with a pressurised Megaflow hot water tank. Occassionally the system pressure j... [Read more]

How can i fix my heating system?

I have a Thorn boiler, sealed system vented (DHW). The water is being heated but the radiators are staying col... [Read more]

grant 70/90 outdoor, sealed system boiler?

I have been losing pressure and some water from system for some time now could'nt find a leak any where indoor... [Read more]