Blue Wire In Thermostat
Thermostat wiring blue wire : i bought my parents a nest thermostat for Blue "c" wire is connected to "y" on old thermostat. new thermostat has Wire heat rh just system thermostat wiring colors figure find standard labels postal functions anything might bad using search
Blue common wire for continuous Nest thermostat power : Nest
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Can't figure this 3 wire system out or find anything in postal about it
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