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Replaced thermostat on FA4ANF030 with Honeywell model rth3100c does not work

Please help us find the possible cause of replacement thermostat not turning on either air conidtion unit outside, nor the air handler inside.
Air handler: Bryant FA4ANF030 and new thermostat Honeywell RTH3100C

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  • DerekS Dec 14, 2007

    I kind of have the same problem. I have a red, white, yellow, white, and orange. I also have a black a blue and a brown which were not used on the AC unit but they are there tucked away.

    My problem is I don't know who labeled this unit last and did they know what they were doing because none of the wires are labeled Aux. So what do I do?

  • Anonymous Sep 13, 2008

    don't know where to pu jumper on hw 3100 terminals on new unit are

    E, AUX, Y, G, O, L, R, B, C

    i can figure out red yellow and green. what do i put the white wire on and where do i put the jumper?

  • Weasel252 Dec 14, 2008

    My old unit has the W1, W2, and the Y wires. It states to call a contractor. I have, and they do not know the answer. Do I use the W1 or W2 wire for the AUX, and what do I use for the B wire. My old unit does not have one.

    Thanks,
    Chris

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If you have a newer t-stat your heat pump reversing valve is either o or b depending on the type of system you have

Posted on Dec 19, 2007

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I had the same issue and called the manufactor and they new exactly which wires went were. The manual that came with the thermostat was incorrect.

Posted on Jun 26, 2008

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If you have a heat pump do not put your blue wire on b. Put it on x or c. If you don't have an inline fuse you may have blown your transformer.

Posted on Dec 04, 2007

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4-wire typical wiring of a thermostat is: Y (Yellow) G (Green) W (white) and R (red). Inspect the thermostat to see if it has a jumper from R1 to R2. If not, put your red wire on R2. On a 5-wire thermostat you may have a blue wire. This will go to the common terminal (usually C but sometimes B) check the inline fuse in the air handler to see if it has blown. Replace it only after wiring the thermostat correctly.

Posted on Dec 03, 2007

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