We have had a Potterton Suprima 80 for 8 years. It ran fine for 5, but the last 3 years have turned into a nightmare which gets worse. We have had 3 PCBs, the last one fitted 10 days ago, and the boiler is still locking out. The thermistor and associated sensor have been changed 3 times as well.
Does anyone know what more we can do to get this thing running as I believe it should; i,e, without locking out?
Any advice welcome.
TIA John