There may be something odd going on here.
If I recall correctly if you dis the flow NTC then it inhibits the boiler from working and lights one of the temperature lights ( the 80 C one? ).
Have you measured the resistance of the sensor???
You must understand that a boiler engineer starts by measuring the restance of the NTCs to eliminate them from the possibilities.
Tony
If I recall correctly if you dis the flow NTC then it inhibits the boiler from working and lights one of the temperature lights ( the 80 C one? ).
Have you measured the resistance of the sensor???
You must understand that a boiler engineer starts by measuring the restance of the NTCs to eliminate them from the possibilities.
Tony