Fixing an air conditioner that keeps freezing up requires addressing the root causes of restricted airflow or insufficient heat absorption across the evaporator coils. Step 1: Turn your indoor thermostat mode switch to "Off" and switch the system fan setting to "On" to force room-temperature air across the coils, allowing the ice to melt completely for 3 to 6 hours. Step 2: Inspect and replace a severely dirty, clogged indoor air filter, which is the most common culprit behind airflow restriction. Step 3: Ensure all return air grilles and supply registers throughout your home are fully open and unblocked by furniture, rugs, or household clutter. Step 4: Inspect your outdoor condensing unit to ensure coils are clean and airflow is unhindered. Verification: Check that copper suction lines are free of frost and chilled air returns smoothly once restarted.
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