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

    Mar 2, 2012, 08:59 PM
    How do you reset high limit switch
    Ducane B050A3B, how do you get the limit switch to reset? Changed filter, checked the registers, changed batteries in thermostat and the LED is still flashing 4 times.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Mar 2, 2012, 11:43 PM
    Most have a button between the 2 spades that wires are connected to,, if none u will have to replace
    thermalmedics's Avatar
    thermalmedics Posts: 153, Reputation: 13
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    #3

    Mar 3, 2012, 10:11 AM
    Quick idea before throwing in the towel is to power off the unit (via breaker or disconnect box) completely. Wait a minute or two and power back up.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #4

    Mar 3, 2012, 11:10 AM
    Thermal,, now you know this part is on a furnace,not the ac., just kidding, good advice and it don`t cost nuthing
    thermalmedics's Avatar
    thermalmedics Posts: 153, Reputation: 13
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    #5

    Mar 4, 2012, 09:10 PM
    You are right I just don't do enough work on gas here in PHX. Like the line from the Dirty Harry movie "a man's gotta know his limitations". I usually keep my mouth shut on gas stuff.
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