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Old 03-12-2013, 04:16 PM   #16
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white rodgers 1F82-261 tstat to carrier 38ycc030300


It looks like both yellow and both orange wires are in the same wire nut. If so, they shouldn't be.
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Old 03-30-2013, 01:05 AM   #17
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white rodgers 1F82-261 tstat to carrier 38ycc030300


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Originally Posted by beenthere View Post
It looks like both yellow and both orange wires are in the same wire nut. If so, they shouldn't be.
After the yellow and orange wires are separated, the heat worked properly. But when the thermostat is set to AC, the fan in the attic comes on, but the outdoor heat pump does not come on.
Checked the connection from thermostat to Attic to Outdoor units, the connection is:

******************************
Thermostat____Attic_______ Outdoor
R -------------------Red-------------Red
G-------------------Orange
O/B----------------------------------Orange
C-------------------------------------Yellow
W2----------------Purple----------White
E jumper to W2
Y no connect
*********************************
There is black wire from the Attic unit connected to a black wire from the outdoor unit, but not connected to the thermostat. Should these 2 black wires be connected to the C terminal of the thermostat?
And the yellow wire from the outdoor unit connected to the Y terminal of the thermostat instead of C?
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Old 03-30-2013, 03:39 AM   #18
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white rodgers 1F82-261 tstat to carrier 38ycc030300


Connect black to thermostat C.
Connect Yellow to thermostat Y.
Blue is not used.


Looks like stat black also needs to be connected to the air handler C.
I only see one black wire there, when I should see two.



Thermostat__________Attic_______ Outdoor
R (red) -------------------R-------------Red
G (green)-----------------G
O/B (orange)------------------------------Orange
C (black)-----------------C----------------black
W2 (white)----------------W1----------White
Y (yellow)-----------------Y------------Yellow
E jumper to W2

Your yellow wires do not connect to the air handler Y.
I would have made this connection, but it probably does not affect anything with this older air handler.

Last edited by Houston204; 03-30-2013 at 03:58 AM.
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Old 05-14-2013, 02:16 PM   #19
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white rodgers 1F82-261 tstat to carrier 38ycc030300


A late thank you for all your advice.
Re-wired the thermostat, air handler, heat pump per the last input, it works!!!!
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