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  1. #1
    Join Date
    Dec 2007
    Posts
    19

    Infinity outside temperature reading high

    Hello -

    This is the first really hot weather we have had since my Infinity system was installed and I noticed that the system seems to be reading the outside temperature too high. I can't seem to get 2 thermometers to agree, but by any measure the Infinity reading is 7 degrees too high - perhaps 12 degrees too high. What effect does that have on my system operation? I guess I should call for service and have this checked anyway, but is this something that should be done ASAP or doesn’t it really matter that much?

    While I am calling them, I haven't been asked to buy an extended warranty - can it be bought after the install? If so, how long might I have to get it? I'd rather put it off as long as I can, but I'll ask them about it now if it matters.

    Thanks.

  2. #2
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,317
    Usually needs to be purchased within 12 months of install.
    The temp being off is not critical.
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  3. #3
    Join Date
    Jan 2002
    Location
    Ft.Worth,Tx
    Posts
    4,584

    Thumbs up

    Quote Originally Posted by rustwood View Post
    Hello -

    This is the first really hot weather we have had since my Infinity system was installed and I noticed that the system seems to be reading the outside temperature too high. I can't seem to get 2 thermometers to agree, but by any measure the Infinity reading is 7 degrees too high - perhaps 12 degrees too high. What effect does that have on my system operation? I guess I should call for service and have this checked anyway, but is this something that should be done ASAP or doesn’t it really matter that much?

    While I am calling them, I haven't been asked to buy an extended warranty - can it be bought after the install? If so, how long might I have to get it? I'd rather put it off as long as I can, but I'll ask them about it now if it matters.

    Thanks.
    The temperature sensor for Infinity controller is located at bottom of outdoor unit next to service panel. I would take a reading there, but it does not effect the operation of system.

    Extended warranty can be purchased by your Carrier dealer at anytime after installation up to 12 months.
    http://www.residential.carrier.com/s...extended.shtml
    "Everyday above ground, is a good day".
    "But everyday that you have made a difference in someones life, may insure you stay above ground a little longer".<aircooled>

  4. #4
    Join Date
    Dec 2007
    Posts
    19
    it does not effect the operation of system
    Not at all? If it is purely informational, then I don't care about it. I thought the system used this info to "anticipate" the cooling demand and/or to "learn" what it needs to maintain an even indoor temperature. Maybe it just doesn't need the outdoor temperature to do that and/or I give it too much credit for being 'smart'.

    I'll try the temperature by the service panel as you suggested. I think I have a/the panel mounted on my house wall next to the unit. Maybe that wall is catching a lot of sun and heating up by late afternoon.

    Thanks.

  5. #5
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,189
    LOL...

    It's good, but it ain't that good.
    Perhaps you should have read the instructions before calling.

  6. #6
    Join Date
    Apr 2005
    Location
    Tampa, Florida
    Posts
    1,634
    That's perfectly normal behavior for an Infinity system. I've had two different Infinity HPs here, both read high, particularly when the unit's been idle for an hour or so. The temperature probe is a small black pencil-sized nub that should stick out about 1" or so from the underside of the electrical service panel.

    It's not entirely eye-candy. In cooling mode, depending on how the dealer configured the system, it can be used to determine when the system should just start in the 2nd cooling stage and forget trying to cool the house on the 1st stage. It also affects how the HP/condensing unit cools itself down at the end of a cycle (runs the outdoor fan for awhile after a cycle but only in very extreme conditions). On my system, the high-temp cooling option's disabled and while it's been hot (99F actual high temp last week), it's still cooler than what the system would deem "extreme conditions" that would require additional cooling after a cycle.

    The outdoor thermometer on that system is far more useful in heating mode (if you have a heat pump), where it ultimately controls the indoor blower speed based on outdoor temperature (to keep the air from the vents from feeling too cool), to control defrost cycles, and to determine when it's too cold to expect the heat pump to do the job alone...and when it's just so $@#$#@ cold that the heat pump's not even worth running (well below freezing). In the heating mode, the extra radiational heating by the sun registering on the thermisister is actually a good thing, as the sun's radiation does provide extra heat the heat pump can use.

    The only way to "correct" the misreading is to relocate the sensor and move it well away from the unit, away from direct sunlight. Not worth the effort. On my system, it's well above the actual outdoor temperature with the late-morning sun bearing down on it (7-12F sounds about right), but once the system comes on in the late afternoon and there's airflow around the heat pump, the thermometer usually agrees with the thermometer on my patio as well as one of my NSF-certified thermometers.

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