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Somewhere in the installation instructions it indicates these are already jumpered (ie, internally). The display & thermostat worked fine for me connecting to only one, and the illustrated installation procedure actually addresses this. (The wifi alone didn’t work, but I don’t believe that the wiring had anything to do with that.)
Sorry, there was a problem. Please try again later.It comes jumpered from factory. The wire terminal id's on the thermostat Do Not match what is on your furnace! Take a pic of old thermo. connections before removing. Zero install instructions on the box! Have to download Emerson app for instructions. Nice thermo once connected.
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