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flyman88
Jan 29, 2008, 05:03 PM
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
Jan 29, 2008, 05:09 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.