The fastest and safest way to unfreeze an air conditioner unit is to turn your thermostat mode to "Off" and switch the indoor fan setting to "On." This forces the indoor blower motor to continuously push warm, ambient household air across the freezing evaporator coils, melting the ice rapidly from the inside out within a few hours. Never attempt to speed up the process by pouring boiling water on the coils or using a hair dryer, as thermal shock can crack fragile copper lines and damage aluminum fins. Verification: Check that water begins flowing steadily into the condensate drain pan as the ice melts.
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