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    jochla's Avatar
    jochla Posts: 2, Reputation: 1
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    #1

    Aug 17, 2009, 02:26 PM
    Mears thermostat circa 1985
    The question I'm asking is whether a Mears 2- wire thermostat, circa 1985 that controlled electric baseboard heating elements, had a build in frost proof protection safeguard that would not allow heat to go below 40 or 50 degrees. Beige, round setting dial.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
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    #2

    Aug 17, 2009, 02:43 PM
    Exact model number?
    jochla's Avatar
    jochla Posts: 2, Reputation: 1
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    #3

    Aug 20, 2009, 01:20 PM

    Mears Model # M401
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
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    #4

    Aug 20, 2009, 01:46 PM
    Sorry I show no listing in my electronic catalogue for that number but there is a M401-25 number but it offers no description.

    I will say that most BB thermostats did not offer a specific setting for frost proofing. In most cases you would just turn it down to accomplish that.
    rays991's Avatar
    rays991 Posts: 2, Reputation: 1
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    #5

    Dec 24, 2010, 03:28 PM
    How do you trouble shoot the mears m401 therostat
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