How do I reset the dust filter reminder light after cleaning the filter?
After cleaning the dust filter, press and hold the Fan button for 3 seconds and the indicator light will turn off. The LED light illuminates after 250 hours of operation as a reminder to clean the filter for more efficient operation. (Page 16)
From the official Frigidaire FHWC054TE1 Window Air Conditioner manual, page 16
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