Changed main board and air switch on this Two to three weeks ago.
It is not used for hot water
If I jump out of the micro switch assembly on the pressure differential, Pump starts fan proves and boiler fires I'm tricking the boiler into thinking there's a call for hot water and I get heat no problem but obviously I can't leave it like this
There is no external thermostat, jumper appears to be correct but I cannot get a call for heat pump does not even start.
I have the manual
Any advise
It is not used for hot water
If I jump out of the micro switch assembly on the pressure differential, Pump starts fan proves and boiler fires I'm tricking the boiler into thinking there's a call for hot water and I get heat no problem but obviously I can't leave it like this
There is no external thermostat, jumper appears to be correct but I cannot get a call for heat pump does not even start.
I have the manual
Any advise