Richard1238
Nov 7, 2008, 05:48 PM
I have a 4 zone hydronic heating system. It is a 15 year old Hydrotherm HI-B series boiler with a new circulator pump.
It has been noticed that when none of the zones call for heat and the boiler is back up to temperature the pump continues to run, a waste of power since al the zone valves are closed.
The control box contains three identical relays. I purchased one replacement relay and substituted it out in all three positions but the pump continues to run. Any suggestions?:confused:
It has been noticed that when none of the zones call for heat and the boiler is back up to temperature the pump continues to run, a waste of power since al the zone valves are closed.
The control box contains three identical relays. I purchased one replacement relay and substituted it out in all three positions but the pump continues to run. Any suggestions?:confused: