About the ecobee3 backplate

This terminal base is used to connect your existing thermostat wires. The description identifies what each mean, your existing wires may be different colors but what is important that the wires match at both ends (Thermostat & HVAC equipment). For example Y/Y1 to Y1, Y/Y2 to Y2, G to G, W/W1 to W1, etc.




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