Issue with main radiator heating. The system has two 2 motorised valves one for radiators and the other the underfloor heating. Underfloor and hot water work fine. Initially with the rads when calling for heat the pump would run but the boiler did not fire up. Checked the motorised valve and it was closed so manually opened it and boiler fired up and radiators warmed up, so assumed it was a burnt out motor.
However, this morning when calling for heat nothing happened so checked the wiring. There is no current going to the motorised valve, so could this suggest the receiver is faulty as it's not giving the signal to the boiler or the motorised valve to turn on? Could I test this by bypassing the receiver, but not sure on the wiring. There are neutral and perm live then a grey cable and a black cable. The black cable is wired to the motorised valve and there is no voltage across it, but there is 240v on the grey cable.
The thermostat/transmitter is a wireless Drayton Digistat and the display suggests that's working and the lights on the receiver also suggest it's working too. However, if you press the override button on the receiver the green light comes on, but nothing happens.
Any advice gratefully received.
However, this morning when calling for heat nothing happened so checked the wiring. There is no current going to the motorised valve, so could this suggest the receiver is faulty as it's not giving the signal to the boiler or the motorised valve to turn on? Could I test this by bypassing the receiver, but not sure on the wiring. There are neutral and perm live then a grey cable and a black cable. The black cable is wired to the motorised valve and there is no voltage across it, but there is 240v on the grey cable.
The thermostat/transmitter is a wireless Drayton Digistat and the display suggests that's working and the lights on the receiver also suggest it's working too. However, if you press the override button on the receiver the green light comes on, but nothing happens.
Any advice gratefully received.