II have purged my system about 4 times and changed the circulator but the flow of hot water only seems to go to the basement and not the 1st or 2nd floor. The boiler fires up, I can feel and hear the circulator getting hot and the pipe from it but it doesn't go upstairs.
I drained the boiler several times but the heat still fails to go past the basement. Can the expansion tank have anything to do with it?
I checked all around the house there are no bleeeders installed anywhere on the baseboard heaters so I can't bleed air from them. What else can I do to get the air out if that is the issue?
Best Answer
For making the system work properly you need to follow a few steps.
Make sure that there is no trapped air anywhere in the system. Therefore you need to find the bleeders on the heaters. They must be there. If you are sure that there are none you could carefully loosen the upper pipe connections one by one until air starts to escape and wait until it starts leaking. Then tighten the connection again.
Once you are convinced that none of the heaters and /or pipes contain trapped air you should verify the water pressure in the system.
Verify that the expansion tank is in working order. Knock on it. If it sounds hollow than the membrane should be good and the tank working. For this step you need to be sure that there is water everywhere in the system. If the tank is faulty you will start to loose water when it becomes hot. Finally resulting in the same situation you have now.