To safely thaw a frozen air conditioner unit, follow a controlled de-icing procedure. Step 1: Turn your indoor thermostat mode switch to the "Off" position to stop the refrigeration cycle. Step 2: Switch the indoor blower fan setting from "Auto" to "On" to force room-temperature air to circulate across the evaporator coils, accelerating the melting process. Step 3: Place towels around the indoor air handler base to catch melting condensation and check the outdoor unit. Step 4: Keep the system running in fan-only mode for 3 to 6 hours until all ice melts completely. Verification: Inspect the copper suction line and evaporator coils to ensure every trace of frost has vanished before restarting cooling mode.
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