MK7: Possible to disable automatic A/C activation with defrost?

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GTIspirit

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This is for 2015 NAR GTI.

Is it possible to disable the HVAC system from automatically turning on the A/C when the climate control is turned to defrost? I come from a place where defrost means heat on the windshield to melt ice, A/C doesn't help much here. It's very rare that I use defrost to unfog the inside of the windshield. I'd rather be able to make the choice myself whether or not A/C should be on when the climate control is turned to defrost.

Is it possible to alter this behavior with coding?
 
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golfi_vend

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Using AC dries the air and therefor defogs windshield faster. That's why it's automatically on.

Call it a safety-system.
 
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GTIspirit

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Um yes, I understand the A/C removes moisture and humidity from the windshield. But in winter heat is what's needed to melt frost frost from outside the windshield. A/C doesn't help when there is no frost or moisture on the inside of the windshield.....
 
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Uwe

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Not sure about that particular car, but on most of the ones I've seen, the compressor won't actually run when the outside temperatures are much below freezing.

-Uwe-
 
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D-Dub

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I have a 14 gti, so not sure this will be the same for you, mine is a standard non-auto climate control;

on the knob that controls where the air flows, ie 12 oclock for defrost, simply set the control for 11 or 1 oclock, this will avoid having the ac kick on and provides essentially the same defrost effectiveness.
 
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GTIspirit

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Doesn't quite work like that. The combi vent setting, Defrost/Feet turns on the A/C. This is my most commonly used setting to avoid air blowing in my face. So it's really annoying to always have to turn off the A/C.

I'd really like to disable this auto-A/C with "Defrost" so I don't have to keep manually turning it off when I hardly ever need it to "Defog."
 
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