A/C blows cold air in only 2 vents

I have a 2000 model Intrigue. The A/C light blinks, and at times, turns off completely. Also, the 2 vents on the driver side blows warm air and the 2 vents on the passenger side blows cold air. The blower motor works fine. My mechanic says in could be the air controller, however, its a costly problem to fix as the dash has to be removed. Im thinking the problem may be related to the A/C control panel. Has anyone have any inputs on these problems? Thanks

Try disconnecting the battery to reset the controller. The other (more likely) possibility is a bad left side temp door servo. Fairly common...