What LootBandit is checking These checks prioritize the cheapest and safest verifications before the reader pays for parts or labor. Why this page exists The page stays focused on airflow restrictions, thermostat mistakes, and drainage problems and calls out when refrigerant leaks, compressor strain, and overheating components should stop the DIY path. Editorial update note This page launches with a clear topic focus and grows stronger over time with better sourcing, fresher examples, and sharper comparisons