Plumbing

"Low system water level" fault - Ariston Microgenus 23

Anonymous user 15/03/2024 - 2.31 PM

Ariston Microgenus 23 MFFI The "Low system water level" lights up occasionally when using the kitchen sink hot water tap. Switching the boiler off and on again fixes the fault. The fault seems unpredictable, the boiler could be fine all day, then could shut down twice within a few minutes in the evening. The mains water pressure is good and the boiler pressure is just over 1 bar. The heating system is working without any problems, as long as the boiler hasn't shut down from the warning. What could be causing the fault? Could it be debris clogging one of the flow switches? Could the Main circuit flow switch require replacement? Here is the boiler manual: http://www.ariston.com/uk/Homeowner/media/files/576_microGENUS_Installation.pdf Here is the parts list: http://www.aristonboilerservicewales.co.uk/pdf/mgenus23_27_e04.pdf