The answer to 'inspection blowing cold air' is that there could be several common causes, such as a malfunctioning thermostat, a problem with the refrigerant levels, or a blockage in the air ducts. The symptoms may include the system running but only blowing cold air, or the air not feeling as warm as it should.
Some potential solutions include checking the thermostat settings, inspecting the air filters, and ensuring the refrigerant levels are correct. However, for more complex issues, it's best to call a professional HVAC technician who can properly diagnose and repair the problem.