Bosch 800 Series HBL8451UC 30-inch built-in electric wall oven
- Category
- Ranges and ovens
- Model number
- HBL8451UC
- Region
- United States
- Manual
- 9000989323 revision C
- Verified
- Error E-code
- Error SELECT MODE
- TEMP NOT ALLOWED
- SABBATH NOT AVAILABLE
- SABBATH ON
- COOLING DOWN
- TIMER END
- OVEN TIMER FINISHED
- Door Lock symbol
- Panel Lock symbol
- Oven door is locked and will not open, even after cooling
- Oven is not heating
- Oven is not cooking evenly or baking results are not as expected
- Food takes longer to cook than expected, or is overcooked
- Oven light is not working properly
- Oven light does not turn off
- Cannot remove the lens cover on the light
- Oven is not self-cleaning properly
- Clock and timer are not working properly
- Control does not react when a button is touched
- How to set the clock
- How to turn Panel Lock on or off
- How to set the oven temperature offset
- How to turn Auto Convection Conversion on or off
- How to start Sabbath Mode
- How to use Fast Preheat
- How to run Self Clean
- How to replace the oven light bulb
Nothing on this page matches. Search all models
Error codes
| Code | Meaning | Checks |
|---|---|---|
| E-code | The oven has detected a fault. | Checks |
| SELECT MODE | No cooking mode was selected within 5 seconds of entering a temperature. | Checks |
| TEMP NOT ALLOWED | The temperature entered is outside the allowed range for the selected mode. | Checks |
| SABBATH NOT AVAILABLE | A timer was running when Sabbath Mode tried to start. | Checks |
| SABBATH ON | Sabbath Mode is running. SABBATH ON shows while the Sabbath timer counts down, then the display shows the time and SABBATH. | Checks |
| COOLING DOWN | The Self Clean timer ended, and the oven must cool before the door can unlock. | Checks |
| TIMER END | The kitchen timer reached zero. | Checks |
| OVEN TIMER FINISHED | The oven timer reached zero and the cooking mode ended. | Checks |
| Door Lock symbol | The oven door is locked. The symbol blinks while the door locks for Self Clean and stays lit while Self Clean runs. | Checks |
| Panel Lock symbol | The control panel is locked and all buttons are disabled. | Checks |
E-code
E and a number appear in the display and the control beeps. The oven has detected a fault.
- Press any key to stop the beeping.
- Reset the oven if necessary.
SELECT MODE
SELECT MODE blinks in the display and an error tone sounds. No cooking mode was selected within 5 seconds of entering a temperature.
- Press a Mode Selection button to select a cooking mode compatible with the temperature.
Source Source: Operation: Setting the Cooking Mode and Temperature, p. 11
TEMP NOT ALLOWED
TEMP NOT ALLOWED shows on the lower part of the screen and an error tone sounds. The temperature entered is outside the allowed range for the selected mode.
- Enter a temperature within the range for the mode.
Source Source: Operation: Setting the Cooking Mode and Temperature, p. 11
SABBATH NOT AVAILABLE
SABBATH NOT AVAILABLE blinks in the display. A timer was running when Sabbath Mode tried to start.
- Clear the kitchen and oven timers, then start Sabbath Mode again. See Start Sabbath Mode.
SABBATH ON
SABBATH ON or SABBATH shows in the display. Sabbath Mode is running. SABBATH ON shows while the Sabbath timer counts down, then the display shows the time and SABBATH.
- Press Oven Clear/Off to end Sabbath Mode and return to normal function. See Start Sabbath Mode.
COOLING DOWN
COOLING DOWN shows after Self Clean. The Self Clean timer ended, and the oven must cool before the door can unlock.
- Wait. SELF CLEAN FINISHED shows when cool down is complete; then press Oven Clear/Off.
TIMER END
TIMER END shows and a tone sounds every 10 seconds for 2 minutes. The kitchen timer reached zero.
- Press the Oven Clear/Off button or the Kitchen Timer On/Off button to cancel it.
OVEN TIMER FINISHED
OVEN TIMER FINISHED shows and the alarm sounds every 10 seconds for 2 minutes. The oven timer reached zero and the cooking mode ended.
- Press the Oven Clear/Off button to clear it.
Door Lock symbol
The door lock symbol shows in the display. The oven door is locked. The symbol blinks while the door locks for Self Clean and stays lit while Self Clean runs.
- Wait until Self Clean disappears from the display; the door can be opened only then.
Panel Lock symbol
The Panel Lock symbol shows in the display. The control panel is locked and all buttons are disabled.
- Press and hold the Panel Lock button for 3 seconds. See Turn Panel Lock on or off.
Problems
- Oven door is locked and will not open, even after coolingThe door stays locked after the oven has cooled.
- Oven is not heating2 causes in the manual. First: the house circuit breaker or fuse has a problem, or the oven has no power.
- Oven is not cooking evenly or baking results are not as expected2 causes in the manual. First: the rack position is not the one the cooking charts recommend.
- Food takes longer to cook than expected, or is overcookedThe temperature should be offset because food is consistently too light or too brown.
- Oven light is not working properlyThe bulb is loose or defective.
- Oven light does not turn offSomething obstructs the oven door, or a hinge is bent.
- Cannot remove the lens cover on the lightSoil has built up around the lens cover.
- Oven is not self-cleaning properlySelf Clean needs a cool oven with loose soil and heavy spillovers wiped out first.
- Clock and timer are not working properlyThe oven has no electrical power.
- Control does not react when a button is touched2 causes in the manual. First: the surface is dirty or wet, or the button was not touched at its center with the flat of a finger.
Oven door is locked and will not open, even after cooling
The door stays locked after the oven has cooled. Source: Service: Troubleshooting Chart, p. 29
- Turn the oven off at the circuit breaker and wait five minutes.
- Turn the breaker back on. The oven should reset itself and become operable.
Food takes longer to cook than expected, or is overcooked
The temperature should be offset because food is consistently too light or too brown. Source: Service: Troubleshooting Chart, p. 29
- Set the Temperature Offset in the Settings menu. The oven is carefully calibrated to provide accurate results. See Set the oven temperature offset.
Oven light is not working properly
The bulb is loose or defective. Source: Service: Troubleshooting Chart, p. 29
- Replace or reinsert the bulb. Touching the bulb with fingers may cause it to burn out. See Replace the oven light bulb.
Oven light does not turn off
Something obstructs the oven door, or a hinge is bent. Source: Service: Troubleshooting Chart, p. 29
- Check for an obstruction in the oven door and check whether the hinge is bent.
Cannot remove the lens cover on the light
Soil has built up around the lens cover. Source: Service: Troubleshooting Chart, p. 29
- Wipe the lens cover area with a clean, dry towel before trying to remove the cover.
Oven is not self-cleaning properly
Self Clean needs a cool oven with loose soil and heavy spillovers wiped out first. Source: Service: Troubleshooting Chart, p. 30
- Let the oven cool before running Self Clean.
- Wipe out loose soil and heavy spillovers first.
- For a badly soiled oven, set the maximum Self Clean time. See Run Self Clean.
Clock and timer are not working properly
The oven has no electrical power. Source: Service: Troubleshooting Chart, p. 30
- Make sure there is electrical power to the oven.
Strong odor when a new oven is turned on
This is normal with a new oven and disappears after a few uses. Running Self Clean burns the smell off faster. Source: Service: Troubleshooting Chart, p. 30
Warm air or steam escapes from the oven vent
Steam or warm air leaves the oven vent. Do not block the vent. Source: Service: Troubleshooting Chart, p. 30
Cooling fan runs when the oven is turned off
The cooling fan runs after the oven is off until the oven has cooled sufficiently. Source: Service: Troubleshooting Chart, p. 30
The oven preheats at a different speed than a previous oven
The lower element is hidden under the oven bottom, so preheat time differs from an oven with an exposed bottom element. Preheat takes longer on an electrical supply below 240 volts and at higher temperatures. Source: Getting the Most Out of Your Appliance: Preheat Reminders, p. 19
How-to
- 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 use Fast PreheatTo heat the oven faster than standard preheat for Bake, Roast, Convection Multi Rack, Convection Bake, Convection Roast and Pizza.
- 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.
Maintenance
| Task | Source |
|---|---|
| Remove racks and accessories before Self Clean; wash flat and telescopic racks by hand | Source: Cleaning and Maintenance: Cleaning Guide, p. 25 |
| Replace a failed oven light bulb | Source: Cleaning and Maintenance: Replacing an Oven Light, p. 26 |
| Leave the fiberglass door gasket uncleaned | Source: Cleaning and Maintenance: Cleaning Guide, p. 25 |
| If racks lose their shine after Self Clean and stop gliding, wipe the rack edges with a little vegetable oil and wipe off the excess | Source: Cleaning and Maintenance: Cleaning Guide, p. 25 |
Settings
| Setting | Options | Default | Notes | Source |
|---|---|---|---|---|
| Temperature mode | Fahrenheit (°F) or Celsius (°C) | °F | Source: Operation: Settings Menu Options, p. 18 | |
| Brightness | High, Medium or Low | High | Source: Operation: Settings Menu Options, p. 18 | |
| Volume | High, Medium or Low | High | Source: Operation: Settings Menu Options, p. 18 | |
| Clock mode | 12HR or 24HR | 12HR | Source: Operation: Settings Menu Options, p. 18 | |
| Auto Convection Conversion | ON or OFF | OFF | Decreases the set oven temperature by 25 °F for Convection Bake and Convection Multi-Rack | Source: Operation: Settings Menu Options, p. 18 |
| Button Beep | ON or OFF | ON | Source: Operation: Settings Menu Options, p. 18 | |
| Standby Clock Display | ON or OFF | ON | Shows the clock when no cooking mode or timer is in use | Source: Operation: Settings Menu Options, p. 18 |
| Language | English (EN) or French (FR) | EN | Source: Operation: Settings Menu Options, p. 18 | |
| Temperature Offset | +/- 35 °F (+/- 19 °C) in 1 degree increments | 0 | Raises or lowers the actual temperature for Bake, Convection Bake, Roast, Convection Roast and Convection Multi-Rack | Source: Operation: Settings Menu Options, p. 18 |
Parts and consumables
| Item | Replace or refill | Specification | Source |
|---|---|---|---|
| Oven light bulb, 30-inch 800 HBL Series | – | 40 watt appliance bulb, standard Edison base | Source: Cleaning and Maintenance: Replacing an Oven Light, p. 26 |
Specifications
Built-in electric wall oven with a touch control panel, a numeric keypad, Fast Preheat, Delay Cook, a Panel Lock, a Sabbath Mode and a Self Clean cycle. The lower bake element is concealed under the oven bottom. Source: Control: Button Descriptions; Getting the Most Out of Your Appliance: Preheat Reminders, pp. 9, 19
The oven has six rack positions, numbered from 1 at the bottom to 6 at the top. The top rack guide only brackets a rack in position 6 and never carries a rack. Source: Getting the Most Out of Your Appliance: Rack Position, p. 19
| Maximum heating time without activity | 24 hours at 100 to 200 °F (30 to 120 °C); 12 hours at 201 to 550 °F (121 to 300 °C); 74 hours in Sabbath Mode | Source: Operation: Heating Time Limitation, p. 11 |
|---|---|---|
| Sabbath Mode | Bake only, 100 to 450 °F; timer 0:01 to 74:00, default 74:00 | Source: Operation: Sabbath Mode, p. 16 |
| Self Clean time | 2:00 to 4:00 hours; 4:00 by default | Source: Cleaning and Maintenance: Self Clean, p. 24 |
| Oven temperature offset | +/- 35 °F (+/- 19 °C) in 1 degree increments; default 0 | Source: Operation: Settings Menu Options, p. 18 |
| Fast Preheat minimum temperature | 200 °F (100 °C); available for Bake, Roast, Convection Multi Rack, Convection Bake, Convection Roast and Pizza | Source: Operation: Fast Preheat, p. 13 |
| Oven light bulb, 30-inch 800 HBL Series | 40 watt appliance bulb, standard Edison base | Source: Cleaning and Maintenance: Replacing an Oven Light, p. 26 |
| Data plate location | Single oven with bottom hinge: left hand side of the door trim | Source: Service: Data Plate, p. 29 |
Recalls
No exact-model match for HBL8451UC in the U.S. Consumer Product Safety Commission recall database, checked . Recalls can name model families, so also check current recalls for Bosch.
Service contact
Bosch Customer Support: 1-800-944-2904, bosch-home.com/us/owner-support/get-support. United States. Source: Front matter: Questions, p. 3
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.
All Bosch handbooks. Report an error to hello@modelhandbook.com.