BoilerFaultCodesYour boiler is simply showing that it is currently working to heat your radiators, which is a normal operating status rather than a fault.
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: Central heating demand
What causes this fault?
This status appears when your room thermostat or programmer signals the boiler to start warming the house. It indicates that the internal pump and burner have successfully activated to circulate hot water through your radiators. Because this is a normal operational message, no parts are broken and no repair is needed.
You will see this code much more frequently during the autumn and winter months when your heating is scheduled to run regularly.
DIY fix possible
No action is required as this is a normal status code.Check your thermostat is set to the desired temperature if you did not expect the heating to be on.
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 5 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.