A/C blowing at half speed?

check the cabin filter, behind the glovebox, unless they changed it

is there an eco setting in the hvac menu which might reduce it?

intake should be the grille below the wipers

 

Yeah sounds like a checkup is needed.

 

You might want to check the Cabin Air Filter/Cleaner behind the glove box. Check YouTube for Prius cabin filter change instructions. They are all basically the same procedure...

 

There is also a Front Seat/Rear Seat Bias setting that reduces output airflow when the back seat is unoccupied. The button shows airflow to front and an 'x' for the back seat. When the LED in this button is ON, you are not getting full airflow from the upper vents. Also, when in front only mode, it knows whether there is a front passenger and shuts down airflow out the passenger side front vents.

 

The actual intake is under the plastic valence that is at the base of the windshield. The cabin filter for the old Taurus was under there, and I've found leaves and dirt gathered under there. If that is the problem, that is minor. In my experience with other models, it is the drains that get blocked, which results in rain water on the front passenger floor as the backed up water flows into the HVAC intake.

 

Please let us know what the problem ends up being...