Why won't my house cool down, despite adjusting the thermostat and ensuring proper ventilation?

There could be several reasons why your house is not cooling down despite adjusting the thermostat and ensuring proper ventilation. Some possible reasons include a malfunctioning air conditioning system, inadequate insulation, air leaks, or the need for maintenance or cleaning of the HVAC system. It is recommended to contact a professional HVAC technician to diagnose and address the issue.