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    bearclaw85's Avatar
    bearclaw85 Posts: 1, Reputation: 1
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    #1

    Nov 6, 2010, 02:43 PM
    Outside Sensor compatibility
    I bought a Lux TX9000TS programmable thermostat to replace my Carrier non programmable thermostat. The Carrier has a S and S1 terminal, which I think is for an outside sensor, which I have never seen outside my home. Can I just cap these off and not use them, and connect the new thermostat, or do I have to buy a thermostat with the S and S1 terminals?
    hvacinmyblood's Avatar
    hvacinmyblood Posts: 4, Reputation: 2
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    #2

    Nov 6, 2010, 03:30 PM
    The carrier may have been using the outside sensor to lock out the heat pump(if that's what you have) or the homeowner may have just been using it as a outside temp reading. You need to figure why that was connected originally.
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