Join Date: Jun 2007
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There are at least two codes for the 6.0's fan clutch (speed sensor and control circuit) but they're Ford-specific so many code readers won't read them.
Someone before me had tangled the fan clutch wiring in the fan on my 6.0 Ex and it was sheared off. It caused all kinds of havoc with codes including some from the transmission because of a shared circuit. Disconnecting the frayed wires solved the transmission code problem (phew!)
In normal driving, even in the Texas summer the engine didn't even heat up w/o a fan clutch (the fan still spins without the wiring, just more slowly), however the A/C would fade out when stopped in traffic so $500 later I had a new fan clutch installed.