BoilerFaultCodesYour boiler is working correctly but is telling you that the room thermostat has been turned up to call for heat.
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: Room thermostat set higher
What causes this fault?
This isn't a mechanical failure but a status update showing that your external controls have requested heating. It physically occurs when the room thermostat sends an electrical signal to the boiler's control board to start the burner. If this code stays on but your radiators aren't getting hot, it indicates that the boiler is receiving the signal but might be struggling to fire up or circulate water.
This code is most frequently seen during the autumn and winter months when householders begin adjusting their thermostats upward to combat the colder weather.
DIY fix possible
Check your room thermostat to see if the temperature is set higher than the current room temperature.Adjust the thermostat down if you do not want the heating to come on.Wait for the boiler to finish its heating cycle; the code will vanish once the target temperature is reached.
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 3 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Remeha Avanta Plus 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.