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My 2002 t&c a/c fan is stuck on full blast. The controller shows it is modulating it but it is not. The temperature and different vent functions work normally but the fan blows full even when I turn off the system unless I pull the fuse for the fan. Any ideas a hobbiest can try to fix this? Thanks.
 

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If this is the ATC system, the finned solid-state fan (blower) control module behind the glove box sounds like it is shorted on. This was a fairly common failure.
The HVAC module sounds like it is trying to control (modulate) the fan speed OK.
 
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