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hvac - why does my heat pump wiring diagram show 7 wires going to the thermostat but the thermostat only says it needs 5? - Home Improvement Stack Exchange
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Wiring a Heat Pump Thermostat to the Air Handler and Outdoor Unit! Functions, Terminals, Colors! - YouTube
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wiring - How do I connect the common wire in a Carrier air handler? - Home Improvement Stack Exchange
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Carrier FB4CNP030… where is the control board? Trying to install a nest smart thermostat but can't find the control board to install C Wire adapter. : r/hvacadvice
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Thermostat wiring help. Heat Pump. Carrier has one Y. nest needs Y1 and Y2? Photos attached : r/Nest
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