Fixing an air conditioner that keeps freezing up requires addressing the root cause of restricted airflow or low heat absorption. Step 1: Turn your thermostat to "Off" and the fan to "On," letting the system thaw completely for 3 to 6 hours. Step 2: Inspect and replace your dirty indoor air filter. Step 3: Ensure all return air grilles and supply registers throughout your home are fully open and unblocked by furniture. Step 4: Check outdoor condenser coils for dirt buildup. Verification: Turn the system back to cooling mode and monitor copper lines for frost accumulation.
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