What should I do if the unit rapidly turns on and off?
Rapid cycling on and off may be caused by a dirty air filter. Clean the filter and check that airflow is not blocked by furniture or other obstacles. If the problem persists after cleaning the filter, contact Frigidaire's service hotline at 1-800-944-9044 (US) or 1-800-265-8352 (Canada).
From the official Frigidaire FFRE053WAE Window-Mounted Room Air Conditioner manual, page 2
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