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Thread: Mystery Board

  1. #1

    Mystery Board

    I just bought a condo with a 1999 Goodman 2-ton heat pump. The air handler is model AW24-05C. In the closet with the air handler, there is a small auxiliary circuit board mounted on the shelf supporting the air handler. There are 4 wires attached to the board, which look like thermostat wires. The board has 2 glass tube-shaped components, 2 SCR-type components, and a few resistors. Does anybody have any idea what this is, and what it does? Thanks for your help.

  2. #2
    Join Date
    Sep 2007
    Location
    Newark, Ohio
    Posts
    112
    Google Accustat, sounds like what you have.

    Quote Originally Posted by btucker62 View Post
    I just bought a condo with a 1999 Goodman 2-ton heat pump. The air handler is model AW24-05C. In the closet with the air handler, there is a small auxiliary circuit board mounted on the shelf supporting the air handler. There are 4 wires attached to the board, which look like thermostat wires. The board has 2 glass tube-shaped components, 2 SCR-type components, and a few resistors. Does anybody have any idea what this is, and what it does? Thanks for your help.

  3. #3

    Thank you!

    Quote Originally Posted by Chuckg222 View Post
    Google Accustat, sounds like what you have.
    Thank you Chuckg222! The Accustat LIM-AH11 is exactly what I have. Apparently it's a thermostat limiting device to keep vacation rental tenants from abusing the A/C.

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