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  1. #14
    Join Date
    Nov 2007
    Posts
    47
    [QUOTE=Skip 2 my lou;1882886]
    Quote Originally Posted by dbb1 View Post
    Thanks to all who replied.

    I do have an external sensor, which is on a separate cable per Honeywell's instructions.

    also make sure that your sensor wires a twisted, however odd this seems, it makes a difference. I generally use 18/3 wire, stretch the length disired, and put it in you corless drill to twist it. Shielded wire can also be used, but not needed in all cases.
    Very interesting! The installer definitely did not use a twisted pair ("homemade" or otherwise) in my install. What kind of bad effects do you observe if you don't twist it? I could understand seeing bad ODT readings, but do you also observe other effects on the behavior of the system?

  2. #15
    Join Date
    Feb 2008
    Location
    Western NC
    Posts
    2,504
    I know that this is probably already been address but.....

    Do you have the humidity function on your stat enabled? That would cause problems as well.

    remote sensor requires twisted pair of wiring. Now, the question is do you have an outdoor temp sensor or an indoor temp sensor.
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  3. #16
    Join Date
    Nov 2007
    Posts
    47
    Quote Originally Posted by iraqveteran View Post
    I know that this is probably already been address but.....

    Do you have the humidity function on your stat enabled? That would cause problems as well.

    remote sensor requires twisted pair of wiring. Now, the question is do you have an outdoor temp sensor or an indoor temp sensor.
    In heating mode, my stat is set to humidify using my Trane 500 humidifier. I suspect you aren't asking about that, so..

    In cooling mode, my stat is set to the "dehumidify using A/C" setting (I could look up the code if needed). I have the allowed amount of overcooling set to 3 degrees.

    My remote sensor is an outdoor sensor, I do not have a remote indoor sensor.

    It definitely is not twisted pair. I assume my installer didn't use it because the installation manual does not call for it (not that I can find, at least).

    Do folks here think I should look into replacing that cable with twisted pair?

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