Haven't touched the system in over a year (last was installing ecobee thermostat). Now have a problem activating heat. The first floor and second share the same return pump back to boiler. For whatever reason, the second floor thermostat (an ecobee) stopped being able to activate the pump (it still activates the valve). The first floor thermostat can activate the pump so I know the pump and the control board are working. Now in order for me to have heat on 2nf floor, I need to turn temperature on first floor way up to make sure first floor heat is on. Any idea how to fix it?
Issues with boiler pump control out of the blue
- Thread starter Alex488
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