Brian H Scottsdale , AZ December 08, 2017 Appliance: Bosch Freestanding Gas Range HGS255UC/01 Bosch Range Hgs255uc/01: Almost everything. How to replace Ignition Device. Easy as pie after watching the Repair videos on line. Oven gas flame igniter- 15 minutes. Temp sensor- 5 minutes. Inner door -taking more time for shipping, but tracking puts it here by today, Just LOVE the simplicity of ordering the right part and replacing it by myself. Just go for it! Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes