The heater is not working properly

If you detect heat at the heater core but no heat is coming out the vents, you have a problem in the climate control system. Or you might have a defective mode door that wont open on the hot side.

This vehicle has electronic controls for the HVAC system, so you need to find a shop that can pull the codes for that system and make repairs. Usually not cheap. However you may get lucky and they find that all it needs is a reset to ring the servo motors back in alignment so they can make the doors follow the full swing path then reset to the proper location that was commanded from the control panel. I had a car that had to be done to it every spring, after it was reset it worked all the way until the next spring.