Can any body help, i have just replaced a very old danfoss room thermostat (it worked OK but the turn dial was a bit dodgy), it had wires, live, nuetral and earth, the new one is a danfoss REP230 it uses no earth, so just connected in the nuetral and live and put a link wire from live to com 3 as per danfoss instructions, the thermostat clicks as it recognises the tempreture but does not switch the boiler on or off as the old one did. any answers please ???