Your boiler is currently operating normally and is in the process of burning gas to provide heating or hot water.
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: Burner mode
What causes this fault?
This code appears when the boiler's internal burner has successfully ignited and is currently generating heat for your radiators or hot water. It is not a fault, but rather a status message indicating that the system is working exactly as intended. You will see this whenever the thermostat or a hot tap calls for energy.
DIY fix possible
No action is required as this is an advisory status code, not a fault.Check your room thermostat or app to confirm your heating is set to the desired temperature.Observe the display to see if the code changes as the boiler completes its cycle.
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 S.14 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.