How do I activate the Child Lock feature to prevent changes to the settings?
Press and hold the Mode button for 3 seconds to activate or deactivate the Child Lock function. The display will show 'LC' for 5 seconds to confirm the lock is active, and the control panel will be locked so that settings cannot be changed. (Page 16)
From the official Frigidaire FHWC054TE1 Window Air Conditioner manual, page 16
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