When the A/C is on Max, it blows lukewarm air

I recently replaced the blend door gears on the driver and passenger side as they both were broken. I then took it in to have my A/C recharged (I had a new engine put in and most of the fluid was dumped out) the passenger side is working perfectly now, but the driver's side is not. When on max A/C the air is lukewarm, it's not cold but it's not hot. I have a new blend door actuator that I have not installed yet. I originally bought it because I thought that was the problem, but the gears were actually broken. I did not install it hoping the gears would fix the problem. Would installing that fix this problem or is it coming from something else?