Georg B San Mateo , CA August 21, 2019 Appliance: Bosch Dual-Fuel Range HDI7282U/03 Bosch Range Hdi7282u/03: Bosch oven was taking a long time to reach temperature and after reaching temp and opening the door it would go into pre heating mode again and not be able to reach temperature. How to replace Heating Element (Heater Assembly). Changed the convection fan heating element. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes