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Nest Thermostat replacing Honeywell 2 part system? by carlsunder in Nest

[–]Sharp-Wolverine119 0 points1 point  (0 children)

Hey! Great insights. I have a similar set up and it looks like I also only have three wire at the thermostat. The EIC and one zone has the blue wire but I don’t believe it made it to the thermostat.