Disable ac on defrost setting

[sunsanvil]

Originally Posted by IllusionX

And I'm pretty sure the compressor still works at -30°C, but the thing acts more like a dehumidifier than AC.

I'd be surprised. Looking at the service manual for the 2007, it shows the evaporator coming before the heater core (and/or PTC), so its not as though the air is heated, then cooled (and thereby dehumidified). Rather it is cooled first which means that when its -30C outside, the A/C would have to achieve a temp at the evaporator of less than -30C to have any effect at all.