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Answered in 17 minutes by:
12/2/2018
VerifiedHello. Happy to help. Are you able to send a picture of the wiring?
Verifiedhvacdave84 and 87 other HVAC Specialists are ready to help you
Customer replied 1 month ago
As you may be able to see, the Blue and Yellow wires are in the same terminal on the thermostat in Y1 but the Yellow wire is loose at the thermostat and was on the prior thermostat
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