I just removed all the air from 2 upper zones in the furnace. I changed the the expansion tank, as well the air release valve. All air problem are gone. The furnace is 16 years old, and has 5 zones on it, that only 4 are on all the time, with the 5th being the basement, used rarely. Now when the furnace turns on, I hear a sound of boiling , rumbling from the furnace. I cannot contact enerjet, they are out of business. I keep the temp of the furnace@ 180. Can anyone help me fix this problem, PLEASE
What is the pressure and temperature in the boiler?
Can we get some pics of the unit and the piping?
What kind of emitters do you have? Baseboard?
Is this a new problem?
Zone valves or circulators?
14,000 BTU? 5 zones?
Answer these questions and we will get you sorted out...
PS- I think you double posted a dozen times or so...
This post was edited by an admin on February 24, 2013 9:28 PM.