Your boiler is struggling to communicate with its remote control unit, often simply because the thermostat has lost its link or the batteries are failing.

DIY fix possible

Check the batteries in your remote thermostat and replace them with high-quality fresh ones.Ensure the thermostat is within range of the boiler and that no new large metal objects are blocking the signal.Switch the main boiler power off at the fused spur for 60 seconds, then turn it back on to reset the connection.