Cabinet heat thermostat fuse open James H. • Mohrsville, PA • September 26, 2014 Appliance: General Electric Microwave JES1139WL03 My Repair & Advice At first I thought it was the supply fuse. Multimeter proofed otherwise. Manufacture schematic outlined the most probable cause the cabinet flame sensor. I bypassed the thermostat fuse sure enough that was the problem. Was this review helpful to you?