BoilerFaultCodesYour boiler is unable to move water around the system, which means it cannot provide heating or hot water safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Pump failure
What causes this fault?
This fault occurs when the boiler's internal pump fails to circulate water, leading to a rapid build-up of heat that the system cannot shed. The most common reasons are a mechanical seizure of the pump motor after a period of inactivity or an electrical failure where the component no longer receives power from the control board.
This issue frequently appears during the first cold snap of autumn when a pump that has been idle all summer fails to spin back up.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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 Test2 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Vokera Hydra is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.