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Fans do not come on when a.c. is turned on.

I just found a check for the ect sensor. When you turn the key in the ignition without starting (cold engine) the temp reads half way.

Left the key in the on position and disconnected the sensor clip. Temp gauge dropped to zero.

Correct me if I'm wrong but doesn't that mean my ect sensor needs replacing?
Doesn't that mean it's good?
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