My AC keeps blowing warm air

I had the same problem. Mine started with my Heater completely going out. The blower motor was shot. Had to get the blower motor, the white wire harness and the resistor replaced. This happened twice within a 2 year span. Then my AC started blowing hot air, hotter than the heater air and wouldn't stop even after turning off the air completely. I would check to see if maybe the white wire harness is melted. Or just check if anything melted.