Replaced main surface thermal limiter, (had to R&R 22 screws just to R&R the cover, some had 6-point star heads). Used a multi-meter to troubleshoot the power supply circuit and locate the defective device. Ordered the replacement part and 2-days after the promised delivery date, the part finally arrived. It took FedEx almost three 3 days to deliver the small part from Jacksonville, FL, about a 6.5 hour DRIVE to Atlanta,GA.