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2 wire Nest Learning Thermostat Installation

Hardhead7525
Community Member

My current Honeywell thermostat has 2 wires.  One is Red to the R connection and a Blue wire to the C connection.  It controls both heat and AC.  Will my new Nest Learning Thermostat work with this set-up?  I assume that the Red is for heat and the Blue is for AC and that the Nest will run off its internal battery.  Thx for any feedback.

Hardhead7525

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