Make sure the trinary blue wire is truly grounded especially if you grounded it to the radiator support. The radiator support is generally mounted to the frame via rubber bushings so it's possible that it might not be grounded.
If you manually ground the green Entropy wire does the fan then run? If it does then either the trinary switch is not getting up to pressure or it is defective, assuming that the A/C compressor is working and the system is properly charged.
On a side note, am I the only one that can't get on Entropy's website? I always get a "Forbidden" error when I try.
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