A frozen air conditioner line and its corresponding evaporator coil typically take anywhere from 3 to 6 hours to thaw completely when the system is turned off and the indoor blower fan is running continuously on the "On" setting. The exact thawing duration depends heavily on ambient humidity levels, the thickness of the solid ice block encasing the coils, and how warm the indoor air is. Forcing warm air across the coils via the fan speeds up the melting process significantly. Verification: Inspect the outdoor suction line and indoor coils visually to confirm all ice has liquefied and drained away.
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