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Old 11-01-2011, 09:36 PM   #1
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Honeywell Thermostat change out


I am a doit yourselfer that is struggling with a thermostat change out. I am replacing a T874R1384 mercury thermostat with a TH1210D1008 Pro 1000 thermostat. I have a carrier heat pump with emergency heat. The old thermostat has 8 wires and the new one only has 6 terminals. I have attached a photo of the current wiring on the old thermostat. Any help would be appriciated.
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Honeywell Thermostat change out-imag0677.jpg  

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Old 11-01-2011, 09:58 PM   #2
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Honeywell Thermostat change out


R = R
C= C
O = O
W2 and E = aux
L = tape off
Y = Y
G = G

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Last edited by hvactech126; 11-01-2011 at 10:00 PM.
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