Truck in my sig is having a problem with a/c. Non-dual climate control set to recirc and full cold, fan on 3. When i start the truck the a/c kicks on and initially starts to cool, reading on the drivers side is ~75 then cools to about 50 then it begins to warm back up to about 72 then it starts cooling to about low to mid 40's. it will cycle from that temp to about mid to high 50's. passenger side is about 8 degrees warmer than driver's side when at the coolest temp and about 14 degrees or more warmer than the driver's side when at the warmest temp, which ends up topping at about mid 60's. any ideas? recirc door is closed, verified with flashlight. blend door seems to be moving correctly but haven't been able to visually see the linkage. temp door seems to move properly according to control setting. had the system evac'd and refilled about 3 months ago. if not serviced correctly cause this situation? could it be the blend doors acting up?

 

Mine does that. Not sure root cause. i just hit the a/c button twice and then the compressor starts working and cooling things off.