This is the second Winter Watchman I have purchased and both have failed upon delivery. I set the temperature sensor to turn on a lamp at 40 degrees and after plugging it in, the lamp came on even though the temperature was 60 degrees! The first one was also very inaccurate and during last winter our neighbor kept having to come over to our cottage to check on why the light was on even though the room temp was fine. Very unreliable product. Expected more from Honeywell.Get more detail about Honeywell S483B1002 winter watchman freeze warning device, 120volt, 120watts.
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