One of the wires on the thermal switch goes directly to the fans at the top. You should be able to make sure that it IS on the fans with a mirror. I would bet it has come off there. Jumper across the thermal switch should turn both on. John
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2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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