Thermostat Wiring Colors Code Easy HVAC Wire Color Details 1
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What If I Don't Have A Yellow Wire For Thermostat? » Fix It Wired
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Thermostat Wire Color Code: Complete Detailed Guide
Nest thermostat install: this is my thermostat's current configuration (note yellow wire isn't connected to anything and blue wire is in Y slot). Should I keep it the same for the nest?