Air Conditioner blows hot on one side after battery DC

Sounds like a blend door actuator failure,Might as well replace both sides

The throttle body needs to be cleaned, grime in this area prevents the throttle plate from closing completely and allowing air to enter, making the air/fuel mixture lean. Make sure to clean the front and back sides of the throttle body. Also, disconnect the battery during the cleaning process to allow the computer to reset and relearn to the cleaned throttle body.

think you have damaged the heating control computer from the sound of it

always check coolant level first, then if ok. check fan for a/c it should come on and run anytime the a/c is on. so turn a/c on and see if fan kicks on right away if not check relay.
hope this helped.

The first thing you need to do is clean the throttle body. This area of the air intake gets dirty and gummed up and prevents proper air passage. While the cleaning is taking place, make sure the battery is disconnected so that the computer will be reset and be able to relearn with a clean air intake.
Next, you need to have the AC refrigerant checked, it may low. OR, the low idle speed because of dirty throttle body just does not allow the compressor to produce enough pressure.

I have the same problem, mine resets itself when the key is turned off.must be a chevy thing.

disconnect the battery and try again to re sync the two sides, this is a common problem on all dual climate GM cars, if you can't get them to resync then you will need to replace the climate control head..

BLOWING HOT AIR YOU MAY HAVE A RESTRICTION ON THE SYSTEM, OR MAYBE A REAL BAD LEAK THAT UR FREEON IS ALL GONE,

just check weather all spark plugs are ok, even if one misfires then turning ac on will stop the engine. during motion the ac manages to get the power from other plugs. i hope this solves ur problm.

try jumping the low side pressure switch on the accumulator if compressor comes on then it is this switch bad.
when you say blowing hot air is it blowing heated air?or just warm due to compressor not kicking on