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Old 02-20-2011, 05:47 PM   #1
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honeywell thermostat


My old digital thermostat has brown wire to C, Yellow to Y, Green to G, Blue to B, Red to R, White to W/W1 and my new Honeywell thermostat has O/B and W on same slot. what do i do with the blue and white wires? put them on same slot?

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Last edited by martin86; 02-20-2011 at 06:14 PM.
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Old 02-20-2011, 06:45 PM   #2
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honeywell thermostat


sounds like you dont have the right stat if no w2 or aux terminal on new one. Do you have a heatpump with back up heat (electric strip or gas)

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Old 02-20-2011, 06:49 PM   #3
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electric and sorry it has W2 do i use that?
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Old 02-20-2011, 06:56 PM   #4
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old--color--new
R--RED--R
C--BROWN--C
Y--YELLOW--Y
G--GREEN--G
B--BLUE--O/B
W/W1--WHITE--W2 AND JUMPER TO E IF APPLICABLE TERMINAL
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Old 02-21-2011, 05:55 AM   #5
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Your Honeywell thermostat uses W/OB as your B on the old stat, and W2 as the W on your old stat.

Sounds like you have a Rheem/Rudd/Weatherking heat pump. If so, you also have to tell the stat to energize W/OB in heat mode.
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