BoilerFaultCodesWhat the manual says
Manufacturer manualNo heat demand: Summermode
What causes this fault?
This status appears because the central heating temperature control on the front of the boiler has been turned all the way to the off position. It physically prevents the boiler from sending heat to your radiators while still allowing it to provide hot water to your taps. It is a user setting rather than a mechanical failure, often used to save energy during warmer months.
This code is most frequently seen during the summer months when homeowners manually disable their heating to prevent the radiators from coming on.
DIY fix possible
Check your room thermostat or boiler control panel settingsSwitch the heating mode from Summer/Off to Winter/OnIncrease the target temperature on your room thermostat to trigger a demand for heat
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
Affiliate links. We may earn a commission at no extra cost to you.