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  1. #1
    Join Date
    Aug 2006
    Location
    Port Richey, FL
    Posts
    2

    Question

    I installed a Totaline P474-1050. I followed the instructions for a 4 wire (red, green, white, and yellow) thermostat (the wire between the thermostat and the furnace has 5 wires but the fifth wire – blue/black, is not connected on either end). Once connected, I tested the A/C portion first and just as the manual indicated might happen, the display went blank. I installed the resistor on the furnace end. There was not terminal strip – only connections with wire nuts. This fixed the display issue going blank when the A/C comes on, but now the display goes blank when the heat comes on…ugh…

    I was wondering if I should convert this to a 5 wire installation, using the unused wire, connecting it to the “C” which I believe is 24v AC comman.

  2. #2
    Join Date
    Jul 2006
    Location
    Lancaster,Ohio
    Posts
    464

    Talking

    I could see myself doing that...what does the instruction say?
    IcyFlame

  3. #3
    Join Date
    Aug 2006
    Location
    Port Richey, FL
    Posts
    2

    4 wire to 5 wire

    The installation instruction show that the missing 5th wire is 24vac goes to "C" 24 vac Common.

    [Edited by fl-lee on 08-15-2006 at 05:35 PM]

  4. #4
    Join Date
    Aug 2006
    Location
    greenville
    Posts
    16
    power robing stat (yuck) hard wire the common and be done

  5. #5
    Join Date
    Jul 2006
    Location
    Lancaster,Ohio
    Posts
    464
    sounds like the final word to me!
    IcyFlame

  6. #6
    Join Date
    Dec 2002
    Location
    NJ
    Posts
    43
    Be very, very, very sure that you connect the common side of the 24VAC wire to C. The other side is probably the red wire which should connect to R, RH, or RC.

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