EWC Controls Forum

I have a 2 Zone, Master/Slave configuration on my Lennox furnace. I recently replaced the Emerson 1F97-12377 Programmable Thermostat with an Emerson Sensi Thermostat. The new thermostat works on Zone 1, but the Zone 2 2nd floor thermostat is no longer able to open the dampers to bring heat to the ...