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Old 04-03-2011, 05:40 PM   #1
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New Thermostat


I have a heat pump on the outside and a unit under the house, which I assume is called a split system (help me)... We have the antique looking thermostat installed now. (all manual) I purchased a new Hunter touch screen 44905. I removed my old and noted the wires. I installed the new one and I can't get the system to turn on. The old is wired as below, I have a black wire that never was hooked up, so I assume It has no purpose.

Y=yellow G=Green R=Red O=Orange

W2=White
E=Brown C=Light Blue

The new thermostat has the following, The left side is for Heat Pump and right for Conventional. Thanks for any info and help. These things have made me feel like a big dumb A$$...
R Rh
Y Rc
G Y
- G
L W
O -
B -
A/E -
Y2 W2
C Y2
- C
- A
- W3

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Old 04-03-2011, 06:38 PM   #2
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New Thermostat


R Rh = RED
Y Rc = YELLOW
G Y = GREEN
- G
L W
O - = ORANGE
B -
A/E - = WHITE AND BROWN
Y2 W2
C Y2 = LIGHT BLUE
- C
- A
- W3

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Old 04-04-2011, 07:32 AM   #3
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New Thermostat


Thanks for the info, I have 1 more question. The brown, and green are connected at the thermostat and travel to the air handler, but out at the heat pump, these wires are not connected at all. Do these wires just function on the handler.
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Old 04-04-2011, 04:26 PM   #4
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New Thermostat


no, they have no function on the outdoor unit. Green is indoor blower, and brown is second stage aux heat.
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Old 04-05-2011, 06:51 AM   #5
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New Thermostat


Thanks, I found that the fuse on the handler was blown during the install of the new thermostat. I have the new up and running. Thanks for the help.
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