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John78
Community Member
since ‎02-08-2022
‎02-09-2022

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The home has multi zone baseboard heat, with the later addition of 2 AC air handlers. First Nest installed fine; the second will only cool or fan.Directed wiring is Green to G, Y1 to Y1, and RC to Rc (and ignoring the blue jumper between RH & RC).The...
The old thermostat uses 3 wires, G, Y, and Rh jumped to Rc. The house was originally zoned oil hot water with 2 wire thermostats plus AC & air handlers added later. Connected as instructed only fan & cool can be accessed. At another location, Nest wo...