Well back to the same problem!!! I have no heat! If I go down to the heat exchanger my lines are cold. But when I go outside to the furnace and remove the return line on the furnace an let it pump, the water is cold then gets hot. I hook it back up, let it circulate and go check my exchanger and the lines are hot as hell. An im good to go for a while. I woke up this morning and my registers are throwing cold air. Go out do the same thing I now have heat.
Is it possible I have air in the line?? Or I'm sucking in air somewhere an it air locks?? I thought maybe the nipple on the bottom of the furnace for the return line was plugged but thats not the case I checked it.
Help!!