Your boiler is not detecting the necessary water movement to heat your home, which is likely caused by a blocked pump or a faulty pressure sensor.

Technical description

Precise information about circulation fault: 0=No fault, 1=Pump blocked, 2=Electrical pump fault, 3=Pump dry run, 5=Pressure sensor fault, 6=No feedback from the pump, 7=Incorrect pump detected, 8=Flow rate at the end of the purge programme is insufficient