The answer to 'installation blowing cold air' is that there are several common causes, including improper thermostat settings, refrigerant leaks, blocked airflow, or a malfunctioning HVAC system. Symptoms may include the system running constantly, poor airflow, and the home not reaching the desired temperature.
Some potential solutions include checking the thermostat settings, replacing air filters, and clearing any obstructions around the indoor or outdoor units. However, more complex issues like refrigerant leaks or a broken compressor often require a professional HVAC technician to diagnose and repair.