In certain modes, the A/C can be on at the same time as you need heat. The idea is to dehumidify the air - and the way that's done is to cool the air to wring the water out of it and then heat it.
I'm pretty sure defrost mode will do that. I'm not sure about the others. A few have reported that the A/C will turn on in vent mode if the floor vent is selected.
Bottom line, the A/C can and will run at times you have not explicitly commanded it to turn on.
I'm pretty sure defrost mode will do that. I'm not sure about the others. A few have reported that the A/C will turn on in vent mode if the floor vent is selected.
Bottom line, the A/C can and will run at times you have not explicitly commanded it to turn on.