I've had this SUV since the spring so haven't used the heater until recently. AC works perfect on both sides and the heat on passenger side is hot. Driver side doesn't heat up though, just blows air. I've watched the flap actuators while changing temperature and the flaps seem to be all switching correctly from what I can tell. I removed one actuator and manually adjusted the flaps myself but that didn't make any difference to the temperature. Has anyone have any idea what may be causing this? Thank you in advance.