The answer to 'air conditioner blowing cold air' is that the most common causes are a stuck compressor, refrigerant leak, or issues with the thermostat or temperature sensors. Symptoms include the AC blowing very cold air, even when the temperature is set higher. This can indicate the compressor is stuck in the 'on' position or there is a refrigerant leak allowing too much refrigerant to flow through the system.
If you notice your AC blowing extremely cold air, first check the thermostat to ensure it's set properly. If the thermostat seems to be working, you may need to call an HVAC technician to diagnose and repair the issue, as improper refrigerant levels or a stuck compressor require professional service.