Yes, you should turn off your air conditioner immediately if you discover that it is frozen. Continuing to run a frozen air conditioner places catastrophic strain on the compressor motor, as liquid refrigerant and ice blocks can flood the compressor and cause permanent mechanical failure. Turning the system off (and switching the fan setting to "On") stops the refrigeration cycle, allows warm air to circulate across the coils, and lets the ice melt safely over a period of 3 to 6 hours without risking equipment damage. Verification: Switch your thermostat mode to "Off" and wait for all ice to completely melt before attempting any repairs.
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