If you discover that your air conditioner coil is frozen solid, you must take immediate corrective action to prevent catastrophic compressor damage. Step 1: Turn your indoor thermostat mode switch to "Off" and switch the blower fan setting from "Auto" to "On" to force room-temperature air across the coils, melting the ice. Step 2: Place towels around the indoor air handler to catch melting condensation. Step 3: Inspect and replace your dirty indoor air filter. Step 4: Allow the system to thaw completely for 3 to 6 hours before restarting cooling mode. Verification: Check that all ice has melted away and water drains properly into the condensate pan.
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