Thermostat C wire connection on Trane - DoItYourself.com Community Forums
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Thermostat C wire connection on Trane - DoItYourself.com Community Forums
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Blue "C" wire is connected to "Y" on old thermostat. New thermostat has separate "C" hookup. Where does the blue wire go - "Y" or "C"? : r/Nest
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What does a thermostat C wire look like? - Quora
What does a thermostat C wire look like? - Quora
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