How to: Top up the pressure on Worcester 4000 Combi Boiler - System pressure too low error

Are you getting "System pressure too low, please refill system to 1.0 bar." error? or just looking to top up the pressure on the Worcester 4000 Combi boiler?

This video shows you where and how to do that if it has the Blue Keyless Filling Loop. Under the boiler, you will find a blue lever. This lever pulls downwards to allow water to flow into the heating system to help increase the pressure.

If your Worcester 4000 boiler does not have the Blue Lever (Blue Keyless Filling Loop) then it may have the braid hose type filling loop.

If you find the pressure keeps dropping regularly then you may have underlying issues with your heating system that need looking at by a Gas Safe Registered engineer. You can find your local GSR on the Gas Safe website.

If you have any questions, feel free to leave a comment or get in touch.

Thanks for watching.