Whirlpool WP4387499 Refrigerator Bi-Metal Defrost Thermostat
Product Description
The Whirlpool WP4387499 is a bi-metal defrost thermostat, which regulates your refrigerator's automatic defrost cycle. This cycle minimizes frost development in the freezer chamber, which can reduce efficiency and storage capacity. The defrost thermostat detects temperature changes using two different metals that are linked together. When the freezer temperature reaches a certain low threshold, the bimetallic strip bends, cutting off the flow of energy to the compressor. This stops the cooling cycle and allows the accumulated frost to melt away. When the temperature rises to a predefined level, the bi-metal strip bends back, restarting the compressor and ensuring the right freezing temperature. This automatic defrosting method assures peak performance and food preservation in your Whirlpool refrigerator.
