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thank you everyone for your help, i have called a tech dude, to come and see it and he believes it the RF communication, some how he fixed it.

If you turn the thermostat right up, the flame symbol should appear, the relay green light come on and the boiler lights. Does this happen? If you then turn the stat right down, the flame symbol should disappear, the green light go out and the boiler stop. Does this happen? the only time...

yes i do, but i dont think it that trigging the relay box to go off. once the thermostat get it the set temp, the relay goes off and doesnt start after the temp drops. so i assume its the relay box.

on the power supply switch, and then the button on the relay box.

When i switch on my HC60NG relay box, if the room temp is set at 21 degrees, and the actual temp is the same or above, the relay switch will go off! however if i was to increase the temp to more then actual room temp it will stay on till it reaches the temp and then go off, it will not start...