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    The furnace is model 21LU105D4A2 ser# 5579-76-727...

    The furnace is model 21LU105D4A2 ser# 5579-76-727
    Np # 21B933/22
    Guessing 1976
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    Wiring for an older ge furnace fan limit switch

    I have an older ge furnace that I can not figure out the wiring for fan and limit switch. There are 3 wires coming out of the switch. The red one marked limit goes to the 24v trnsformer, the green...
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