No, AC coils will almost never unfreeze on their own while the system is actively running in cooling mode. In fact, if you leave the cooling system turned on while it is frozen, the layer of ice will continue to thicken, completely blocking all airflow and potentially flooding liquid refrigerant back into the compressor motor, which can cause permanent burnout. To unfreeze your coils, you must manually turn the cooling off and switch the blower fan to the "On" position, allowing warm ambient household air to circulate and melt the ice over several hours. Verification: Inspect the indoor evaporator coils and suction lines visually to confirm all frost has liquefied.
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