Your boiler is working perfectly fine and is simply resting until you turn on your 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: The boiler is in standby mode awaiting either a central heating call or hot water demand
What causes this fault?
This is not a technical fault, but rather a status indicator showing the boiler is powered on and ready to work. It appears when there is currently no demand for warmth from your thermostat or hot water from your taps. The boiler is simply sitting in a fuel-saving state until you next need it.
This code is seen more frequently during the summer months when the central heating is turned off and the boiler only wakes up briefly to provide hot water.
DIY fix possible
Turn up your room thermostat to trigger a heating requestTurn on a hot water tap to trigger a hot water requestNo action is required if you do not currently need heating or hot water
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 0 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.