The Whirlpool WP305169 Dryer Thermostat is a safety device located within your clothes dryer. It's like a switch that keeps a close eye on the dryer drum's temperature. As the temperature rises, the thermostat monitors it and ensures it does not exceed a predetermined safe level. The heating element receives a signal from the thermostat telling it to shut off when that limit is reached. By doing this, you can avoid your clothing overheating, becoming damaged, or even starting a fire. In brief, a properly operating Whirlpool WP305169 Dryer Thermostat is essential for safe and effective clothes drying, protecting both your clothing and your dryer.