Two possibilities come to mind.
1. Diverter door or its actuator not working for front. Sometimes you can hear them move in which case if so it's broken and you would need to go there to see just what the fix would be.
2. Control head (I don't think it's that common in a Honda anything) but it may be sending wrong info??
This could be a tough DIY thing. Dealer would take this on but also consider shops that take on A/C problems too. Check if warranty is in effect on a 2006! Some hide that certain things are covered longer than you may know!
T
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Tom Greenleaf - MetroWest, Boston