BoilerFaultCodesYour boiler is receiving electrical power and is currently switched on or ready to operate.
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: MAINS
What causes this fault?
The orange light indicates that the boiler is receiving a live electrical supply and the main switch is set to the 'on' position. This is a normal operational status and does not represent a physical failure or a broken part. If your boiler is not providing heating despite this light being on, it usually means the system is simply waiting for a command from your thermostat or timer.
DIY fix possible
Check that the power switch on the wall or fused spur is turned onEnsure your room thermostat is turned up high enough to call for heatCheck if any timers or programmers are set to an 'ON' period
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 Orange Light — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Glow-worm Swift Flow 100 is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.