WB21X10148 - GE Microwave Thermostat

This Microwave Thermostat (WB21X10148) is a genuine GE part designed specifically for GE microwaves. It functions by measuring the internal air temperatures to regulate cooking power, thus preventing overheating or damage to other components. The thermostat achieves this through the action of bimetallic flexing contacts that open or close when temperatures cross set thresholds. While basic models provide essential overheat protection, more advanced versions dynamically control the magnetron's outputs during operation. In case of a defective thermostat, which is indicated by its inability to regulate temperature properly or provide adequate thermal protection, a replacement is necessary. Common symptoms of a failing thermostat include the microwave overheating or not heating uniformly. Before purchasing this part, customers are advised to verify their microwave's model number for compatibility.