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The aux fans should come on low speed as soon as the A/C is turned on. Then go to high speed when the engine reaches 107C OR the A/C pressure reaches 295psi.
If you have a RED pressure switch in the drier then the fans will go to high speed when the A/C pressure reaches 220psi.
Soft top problems aren't DIYer, even many repair shops don't have the correct diagnostic equiptment to diagnose this system.
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