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 working. I follow the pipes and the water comes in cold, goes through the boiler, the pipe is then HOT, but then it connects to the pump, and the circulator and by that time, the pipes are cold. The circulator is also making a humming/buzzing noise. I've tried to reset the circuit breaker, but that hasn't fixed the problem. Please help...its getting cold up here in the northeast!
Gizmo is right again! I would try a rap with rubber hammer while the pump is energized. Sometimes this will free the pump. But, you should probably get a new one , just in case. Find out why it failed. Is it sized right, is the feed valve working? Call a trusted plumber and have him look for an hour! Good luck!................
First make sure that the boiler is under pressure, should have a gage somewhere and about 12 LBS and no air in the system. If it's humming/buzzing it may be turning but needs water pressure. If that's not it hopefully there are isolation valves on either side of the pump for removal. If not you will need to drain the system down to remove the pump. I would be ready with a new pump if needed.
