Articles
I’m trying to tidy up this page. The plan is to create sections where you can look for links to pages on the site. A page link may appear in more than one section. You can also search the site, using the search icon at the top.
I’ve been using a drop-down Articles menu for this page but the drop-down list is simply too long, so the links to individual pages will be on this page. At the moment the links are in an alphabetical list which will eventually be in the lower part of the page.
I’ll also flag up new or “important” pages as links just here:
Articles – alphabetical list
3 Amp Fuse For Domestic Heating Systems
UK domestic central heating systems should be protected by a 3 Amp fuse. Too often higher rated fuses are fitted…
Air Locks
Air locks are a real pain. We look at air locks in domestic hot and cold water pipes and in central heating systems. We look at how they happen and ways you can clear them…
Boiler Pressure
What should the central heating system pressure be? Why does it change and is that a problem? How to check and adjust the pressure…
British Gas BG330+ Boiler F4 Fault Code Lockout
We were called to a British Gas BG330+ boiler which had developed an F4 fault code. This also applies to the Glow-worm Flexicom hx boiler…
Central Heating
How your central heating system works. We’ll take you through what is going on in your central heating system when it is running normally…
Expansion Vessel Faults
Expansion vessels in boilers or central heating systems don’t last forever. When they fail they cause big swings in pressure and the system loses water…
Honeywell Motorised Valve Faults
Honeywell motorised valves last a long time but they can develop faults. We look at the faults and how to fix them and at other motorised valve faults…
Ignition Lockout — Frozen Condensate
Exposed condensate pipework can freeze in very cold weather, causing your boiler to lock out…
Potterton Suprima Boiler Faults
This is an overview of problems with Potterton Suprima boilers…
Radiator Balancing
There’s an easy way to balance radiators. It works better than any other way we know and almost anyone can do it…
Radiator Valves
Thermostatic radiator valves and manual valves, wheelhead valves and lockshield valves. The differences between them, how they work and the faults they develop…
Setting High and Low Combustion Rates on Vaillant Gas Boilers
It’s often difficult to find how to set minimum and maximum combustion rates. We list some of them here…
Setting Min and Max Combustion Rates on Ideal Gas Boilers
How to set Min and Max combustion rates on Ideal gas boilers…
Viessmann Vitodens 100-W Low-rate CO₂ Problem
Viessmann Vitodens 100-W boiler with a low-rate CO₂ level that was too low…