when the heat is off air still flows from the vents
see the instructions for your touch panel~
Is your fan on? If you leave the environment controls in the on position even though the heat - A/C is off, you have vented air circulating. Turn the control to the OFF position. I hate the off position, I must have fresh air at least circulating. My wife hates it, so that's why in my Buick I got the dual ventilation controls.
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