Is It low voltage or line voltage?,sounds like low voltage to me.If it is, go find the heat relays,may be mounted by the panel or in one of the jb's on the end of the heater,they are about 2 inches by an inch and a half,by an inch,and should say honeywell on it.If your not sure if low voltage or line voltage the stat will be a two wire #18 control wire(size of door bell wire).If it is give the relay a whack with a screw driver handle that will usally free them up temporaly.If it is a line stat it will more than likley be a #14 or #12 wire(normal size house wire think loomex) and should read 240 volts,don't **** arond with that it hurts when you make a mistake.More info please,Dan