Air conditioner blows hot air inadvertantly.

Yes I am find to drive

this could be a hole in an AC line trace or have the lines traced replace and replaced Freon

Could be a blockage in the lines to the rear unit.
Might be low on freon too. Or a blend door problem.
Can you check under the floor and see if one of the lines is cold ?

Could be a list of things including low on freon, low pressure switch, relay, or the a/c clutch on the compressor.

1--BLEND DOOR NOT SEALING PROPERLY
2--FRONT CONDENSOR PLUGGED UP WITH DEBRIE
3--FRONT CONDENSOR NOT TRANSFERING HEAT (SPRAY WITH GARDEN HOSE WHILE ---RUNING SYSTEM IF IT WORKS BETTER CONDENSOR MAY HAVE TO GET CHANGED
4--WRONG CHARGED WEIGHT IN SYSTEM
5--COMPRESSOR CYCLE TIME NOT CORRECT
6--IF COOLANT CABLE VALVE ON SYSTEM MAY NOT BE CLOSING CORECTLY
---TRY PINCHING OFF THE COOLANT LINES TO HEATER CORE

check the sensor in the dash near the controls looks like a tiny vent see if it has dust build up

your ac is freezing up try replacing the expansion valve

car air conditioner blowing hot air , this kind of problem often cause by a refrigerant leak or clogged condenser.

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

Go get freon. you can get it at any auto part store, i had the same problem.. Just make sure you use the right tip, as it will spray all over and will cause frost bite.