Did you ever check the resistance of the DHW sensor?
Actually NONE of the things you have found are unusual at all.
You need to make up a check list to ensure you check them!
EXV pressure
PRV leaking
Sensor resistances
DHW flow switch
All everyday problems and nothing strange or unusual.
Tony
Actually NONE of the things you have found are unusual at all.
You need to make up a check list to ensure you check them!
EXV pressure
PRV leaking
Sensor resistances
DHW flow switch
All everyday problems and nothing strange or unusual.
Tony