Bosch HBL8451UC how to use Fast Preheat
To heat the oven faster than standard preheat for Bake, Roast, Convection Multi Rack, Convection Bake, Convection Roast and Pizza.
Steps
- Set the cooking mode and a temperature of at least 200 °F (100 °C).
- Press Fast Preheat. The fast preheat icon appears above the mode name.
- Press Start.
- To turn Fast Preheat off, press Fast Preheat again.
Fast Preheat is not available for Broil, Convection Broil, Proof or Warm. An error tone sounds if it is not allowed for the selected mode.
Source: Operation: Fast Preheat Source: Operation: Fast Preheat, p. 13
Other HBL8451UC procedures
- How to set the clockTo set the time of day. The oven must be in Standby, not cooking or timing.
- How to turn Panel Lock on or offTo disable all control panel buttons, for example before cleaning the panel.
- How to set the oven temperature offsetWhen food is consistently too light or too brown.
- How to turn Auto Convection Conversion on or offTo control whether Convection Bake and Convection Multi-Rack lower the set temperature by 25 °F.
- How to start Sabbath ModeBefore cooking on the Sabbath. Sabbath Mode works in a Bake mode only, between 100 and 450 °F.
- How to run Self CleanWhen the oven is heavily soiled and needs the high-temperature cleaning cycle.
- How to replace the oven light bulbWhen the oven light is not working properly.
Sources
- Use and Care Manual, Built-in Ovens 800 Series HBL84, HBN84, HBL86, HBN86 and HBL87. BSH Home Appliances Corporation. Document 9000989323, revision C, 80 pages, en-US. media3.bsh-group.com (PDF). Listed on the manufacturer's support page. Retrieved 13 November 2026.
Page numbers are the numbers printed in the manual. Where this page and the manual differ, follow the manual.