BoilerFaultCodesTechnical description
Heating mode error – no heat demand
What causes this fault?
This status occurs when the boiler is waiting for a signal from your thermostat or timer to begin heating the radiators. The most common reason is that the room temperature is already higher than the thermostat setting or the programmer is currently in an 'off' period. It essentially means the boiler is sitting in standby mode because it believes no heat is currently required in your home.
This is frequently seen during the transition into Spring or Autumn when warmer outdoor temperatures mean the indoor thermostat is satisfied and doesn't trigger the boiler.
DIY fix possible
Check that your room thermostat is set higher than the current room temperatureEnsure your heating programmer or timer is set to 'ON' or 'AUTO'Replace the batteries in your wireless thermostat if the screen is blank