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Old 02-28-2011, 12:33 PM   #16
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from what I can tell. green wire is on common terminal & yellow wire is on cool relay terminal. looks like blue wire isn't connected. You can wire it any way you want, but wires have to match from board to t.stat. Green wire is usually connected to g on board & g at t.stat & blue wire would/could be on c or you can use the yellow. what ever colors you use at the board for r w y c have to match r w y c at t.stat


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Old 02-28-2011, 02:51 PM   #17
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Post brand and model number of your outdoor unit. Almost looks like you have a dual power source set up.
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Old 02-28-2011, 10:58 PM   #18
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HI All,

thanks for all the help, it did turn out to be a bad blue wire going from the wall to the furnace, got it replaced today and that solved the problem.
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Old 03-01-2011, 05:09 AM   #19
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Good to hear it was something simple.



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