BoilerFaultCodesYour boiler is currently working at its lowest heating level and is not reporting 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: Boiler status - Burner operating at minimum power
What causes this fault?
This is not a fault, but rather a status indicator showing that your boiler has successfully reached its required temperature and is now running at its lowest internal setting to maintain that heat efficiently. It occurs when the demand for heating or hot water is low, allowing the system to save energy rather than turning off completely. You do not need to take any action as your boiler is operating exactly as intended.
DIY fix possible
This fault may be fixable without an engineer. Check your manual first.
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 1 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.