BoilerFaultCodesYour boiler has detected that the water pressure is too low and it is currently trying to top itself up automatically.
This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.
Technical description: Refilling system pressure
What causes this fault?
This code appears when the water pressure inside your heating system drops below the minimum level required for the boiler to operate safely. It is usually caused by tiny amounts of air escaping through radiators or after you have recently bled your radiators, though a small leak in the pipework could also be the culprit. The boiler has recognized this drop and is currently using its built-in internal pump to restore the pressure to the correct level.
This notification is more frequent during autumn when homeowners turn their heating back on for the first time and air bubbles move through the system.
DIY fix possible
Wait a few minutes to see if the 'Intelligent Filling System' completes the top-up automatically.If it does not stop, check the display for a prompt to manual override the filling valve.Check visible pipework and radiators for any signs of water leaks.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 2968 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.