My 2 year old electric boiler is not working, and I think its the cartridge circulator. How can I troubleshoot?
Sunday, October 16th, 2011Question by Chris P: My 2 year old electric boiler is not working, and I think its the cartridge circulator. How can I troubleshoot? I just had a new system put in 2 years ago. The heat worked last week, all of sudden, the circulator is making a humming/buzzing noise and my heat is not [...]