Working now after switching it off at spur for 5 mins. Now displaying 5. 4
Receiver is a digital scr by inflow sender is digital +2 rf
Will see if it's working tomorrow.
After summer I got heating working after bleeding rad to reduce pressure on boiler. Working for 1 day now I can't get it working. Signal goes from rf thermostat to receiver but heating don't come on. Pressure OK. Water ok