The answer to 'dehumidifier short cycling' is that a dehumidifier short cycling, or turning on and off frequently, can be caused by several common issues. This can include the dehumidifier being too large for the space, a dirty air filter, or a malfunctioning humidistat or thermostat. Short cycling wastes energy and can shorten the lifespan of the dehumidifier.
To troubleshoot and fix short cycling, first check the dehumidifier's size and ensure it matches the square footage of the room. Clean or replace the air filter regularly. Check the humidistat and thermostat to make sure they are functioning properly. If the issues persist, it's best to call in a professional HVAC technician to diagnose and repair the dehumidifier.