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    flyman88's Avatar
    flyman88 Posts: 1, Reputation: 1
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    #1

    Jan 29, 2008, 06:03 PM
    Where is the limit switch on a trane XL90?
    Had a Trane XL90 two-stage high efficiency gas furnace installed in 02'. Open limit switch diagnostic L.E.D. came on last night and the electrical schematic is completely corroded need help finding the switches. Thermostat said 43 this morning.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
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    #2

    Jan 29, 2008, 06:09 PM
    Sorry but no diagram here. You usually can locate the limit switch buy description. Usually the size of a quarter with 2 or more wires on it.

    Usually they are held in place by two 1/4 inch screws.

    Look at the sticky notes at the beginning of this board for some pictures of limit switches.
    JustSomeDude's Avatar
    JustSomeDude Posts: 1, Reputation: 1
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    #3

    Feb 22, 2012, 04:29 AM
    The manual reset switch on a Trane XL90 is mounted upside-down ON THE BOTTOM the silver burner box at the top of the furnace (the silver box with the window that encloses the burners). The little red switch itself is obscured by the two leads that connect to it, but if you look from one side, you'll see the small red switch -- push it once and you're reset.
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