How To Repressurise Your Combi Boiler With An Internal Fitting Key
All Combi Boilers have a pressure gauge, which is a small dial usually located by the boiler controls. Your boiler pressure should be between 1 and 1.5 bar on the pressure gauge. If your combi boilers pressure drops below 1 bar it can lead to your central heating system not functioning properly. It could also mean that there is a leak somewhere in the system, coming from a pipe or radiator.
Increasing your combi boilers water pressure is a simple maintenance job, which you should be able to conduct yourself by carrying out the following steps:
- Turn off your combi boiler and check all bleed valves on radiators are fully closed. If they aren’t closed they’ll leak water and pressure.
- Located beneath the boiler is a concealed white plastic tray. Remove this by pulling the tray towards you with the grooved handle.
- Attached to the concealed tray you will find a plastic key that you need to remove.
- Locate the white plastic nut underneath the combi boiler. Next to this you should find a slot where they key will fit.
- Insert the key firmly into the slot, with it lined up with the open padlock symbol.
- Turn the key to the close padlock symbol to lock the system.
- Turn the white plastic nut anti clockwise. You should now hear water flowing into your central heating system.
- Keep your eye on the boilers pressure gauge. Once it reaches 1.5 bar turn the white plastic nut clockwise until you hear the water stop.
- Turn the key back to the open padlock symbol and remove. A little bit of water may come out, this is normal.
- Replace the key into the plastic tray and reattach this to the bottom of your boiler.
- Turn the boilers power back on.
Get In Touch
If you don’t feel confident repressurising your boiler yourself call us on 0758 0395 493. Alternatively, you can email us at firstname.lastname@example.org and a member of our team will get back to you as soon as possible. We also recommend getting in touch if you are regularly having to repressurise your system as you may have a leak.