01 Honda Odyssey No heat in front (but yes in back)

I have a 01 Honda Odyssey and I am getting no heat in the front of the van. In the back I can get heat just fine. Also the front blows on all setting, just cool air. I am wondering if anyone has some suggestions of what it might be and what I can check. Thanks a ton!

The heater/AC damper door control is not working. Located in the heater/AC air-box behind the dashboard…SOMETIMES you can access it by removing the glove box…Otherwise it’s a job for a skilled dashboard mechanic…

Thanks! I will look into that.