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Thread: Ecobee 4 Installation Help - Unit On, Equipment Not Working

  1. #1
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    Question Ecobee 4 Installation Help - Unit On, Equipment Not Working

    Hello everyone. I got help here once so I am going to take another stab. I had an Trane XL950. It simply didn't work well. Froze all the time, disconnected from the wife all the time. Just had it. So, I bought an Ecobee4.

    My equipment is as follows - outside unit is the Goodman ssz140301. The unit in the attic is a Goodman ARPT36C14AB.

    My original Trane was wired as follows (3 wire):

    D (Data) = White Wire
    R (24 Vac HOT) = Red Wire
    B (24 Vac Common) = Blue Wire

    There are also additional bundled wires in the wall not used (Yellow, Brown, Black, Green).

    When I tried to match up the wiring above to the new thermostat is was a bit of a lost cause. Since this is not my thing I tried but there wasn't a match on the new Ecobee wiring diagram. However, I am sure I got it all wrong. The Ecobee turns on goes through the setup but nothing works. I double checked the breakers and everything. The unit turns on but the Fan, Heat or AC never come on.

    I connected the following on the Ecobee 4:

    Left Terminals:
    Rc = RED
    G = Green
    Y1 = Yellow
    Y2 = None
    O/B = White
    PEK = None

    Right Terminals
    Rh = None (Ecobee says it auto jumps)
    C = Blue Wire
    W1 = None
    W2 = None
    ACC-= None
    ACC+= None

    Hopefully you guys can easily pick out what is wrong. I do have pictures if you need them.

    Old Thermo:

    Click image for larger version. 

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    New Thermo:

    Click image for larger version. 

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    Relay unit in Attic BAY24VRPAC52DBA
    Click image for larger version. 

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    Last edited by DarenG; 04-03-2019 at 10:39 AM.

  2. #2
    Junior Member

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    Update: I think I may have figured it out. Based on what I am looking at on the Relay, it appears that the TRANE had a Relay on the one Thermostat that allows for the downstairs one to be connected via the 3 wires above. Plus, when I looked it up it appears that is also the communication module for the Trane Thermostats.

    So, I unhooked all the wires and spliced the like colors in essence bypassing the RELAY. I have no idea if this is a good or bad idea or if it will impact the performance of my system at all. The two train units really didn't "talk" to each other anyway. If I like this Ecobee 4 I will just replace the other one as well.

    Testing now the FAN, HEAT and AIR. Let you guys know how it goes.

  3. #3
    Junior Member

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    Testing completed. Everything is up and running. Sorry to bother you guys since I figured it out. Hopefully, this will help someone else who has a similar problem getting the Ecobee 4 to work.

    Thanks everyone.

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