Still not working.
Seems to work went it wants.
Voltage Ok at terminal from ext control.
What should the readings be on the Central Heating Temperature Sensor,
When cold and when hot.
Just been having another look at the boiler,if I turn the hot water temperature control knob right down the CH neon will come on as soon as you turn it up it's goes off ????????????
Left it turn down and the heating works fine all radiators nice and hot.
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