Why would a/c work in rear seat and not the front seat? on 2004 Honda Pilot

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
The a/c works fine in the back but the front is blowing hot air.
(2) Answers
Automatic climate control -control unit is probably faulty. Will it switch to defrost and still blow warm air (onto the windshield)?
Qualified Local Honda Shops
Qualified Honda Shops For This Repair