BoilerFaultCodesYour boiler has stopped working because the water isn't circulating properly, likely due to a blockage, air in the system, or a mechanical failure.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: All Boilers
What causes this fault?
This fault occurs when the internal sensors detect that water is not moving through the boiler quickly enough to safely carry heat away. The most common reasons are a buildup of sludge or debris blocking the pipes, an air lock trapped in the system, or the internal pump failing to spin correctly.
This issue often surfaces in autumn when the heating is turned back on for the first time, as pump components can seize during a long summer of inactivity.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like 107 — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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