Hot Blast furnace, problem with fan switch

Dana987 Posted By Dana987, Sep 29, 2017 at 10:14 AM

  1. Dana987

    New Member 2.

    Sep 29, 2017
    Bethesda, OH
    My friend has a Hot Blast furnace and the guy who did the wiring burnt up the automatic fan switch button. I took the 5 inch probe bimetal type switch off the old furnace and installed it and it worked fine for 2 years till my friend started messing with it and the blowers ran nonstop. They bought a new automatic fan switch button and I put it on and they started a fire last night and the blowers cycle off and on all the time running a few seconds and off a few seconds. I wired it so the hot wire ran thru the switch then to the blower motors. Is it wired correctly?
    Thanks for any help.

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