BoilerFaultCodesYour boiler has shut down because too many reset attempts were made remotely or via the interface, and it now requires a manual reset or investigation to ensure it is safe to run.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Remote reset lockout
What causes this fault?
This fault occurs when the boiler has been restarted too many times in a short period using a smart thermostat or remote app without the underlying issue being fixed. To prevent damage or safety risks, the system automatically disables remote control and requires someone to physically check the boiler. The root cause is usually an initial minor fault that was repeatedly cleared until the software triggered this security lockout.
DIY fix possible
Locate the reset button on the boiler control panel.Press and hold the reset button for five seconds.Wait for the boiler to restart; if the code returns immediately, do not attempt further resets and call a professional.
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 F13 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
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.
Affiliate links — we may earn a commission at no extra cost to you.