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Old 12-23-2004, 01:24 AM   #1
949
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Question moding upper vent to no a/c on

does anyone know how to disconnect the a/c on feature when i switch to the upper defrost on the windshield. all i want is the heater and no a/c but it keeps turning on. i have seen the mod for the wrx but non for the sti. i noticed the sti is not mechanical like the wrx. thanks ahead.
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Old 12-23-2004, 08:14 AM   #2
Mulder
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I don't think it's possible in the STi because of the electronic HVAC control. It's easy in the older cars with mechanical HVAC since all you have to do is disable a switch, but in the STi this function is integrated into the electronics. I'm afraid you're stuck with it.
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Old 12-23-2004, 12:33 PM   #3
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if anyone has tried to do this please post up the how to do.
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Old 12-23-2004, 01:03 PM   #4
mbiker97
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Have you taken your radio out and looked to see that the HVAC is different? The 04 STi uses the same HVAC unit as the WRX IIRC.
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Old 12-23-2004, 01:08 PM   #5
Mulder
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I've seen the HVAC in the 04 STi, it's the automatic/electronic setup.
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Old 12-23-2004, 01:33 PM   #6
mbiker97
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Good to know.
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Old 12-25-2004, 05:43 PM   #7
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Would the STi's automatic setup get upset if you disconnected the compressor clutch's electrical connector?
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Old 12-26-2004, 12:28 AM   #8
Uncle Scotty
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Quote:
Originally Posted by vrg3
Would the STi's automatic setup get upset if you disconnected the compressor clutch's electrical connector?

The world would end immediately.
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Old 12-26-2004, 12:30 AM   #9
vrg3
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Has that been empirically verified, Unc?
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Old 12-26-2004, 12:30 AM   #10
Uncle Scotty
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...and the first time I had my dash apart to wire in my gauges, I snipped that damned little bastard of a switch that turned on the damned AC compressor with the defrost.....
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Old 12-26-2004, 12:30 AM   #11
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.....yes, verified.
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