Hi going to do a factory reset, Valliant think this would be a good first step...
going back, briefly to my idea for the programmer mod.....
if I use a two way switch, disconnect the cable to the supply terminal of the HW and route that to a switch input..the output would go to the HW supply terminal, so effectively One position on the switch would simply put the power back where I disconnected it from, Normal operation....the second switch input would be a connection to the Heating output terminal....supply terminal would effectively
so with the switch in Position A the HW & Heating would be as normal. With the switch in position B, the HW supply terminal would get its power from the Heating output terminal, so only if the heating was ON would the HW get a supply.....would this allow the programmer to work as normal ?, because when the heating is OfF, the HW would Not have power, wondered if this was used for the programmer HW programming....or if the supply for the programming was separate...
hope that’s clear......
