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Bosch
Electric Wall Oven

Model # HBN456AUC Official Bosch wall oven

Here are the diagrams and repair parts for Official Bosch HBN456AUC wall oven, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Installation guide
Owner’s manual
Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 139 parts  |
Oven Bulb 420228
Oven bulb

Part #420228

Replaced by #00189351

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Manufacturer substitution
This part replaces 420228. Substitute parts can look different from the original.
$25.79 | 
16% OFF Phone Price : $30.79
In Stock
Sleeve 420182
#420182

Upper body diagram

Sleeve

Part #420182

The manufacturer no longer makes this part, and there's no substitute part

Oven Element 239404
Oven element

Part #239404

The manufacturer no longer makes this part, and there's no substitute part

Cover 240763
#240763

Lower body diagram

Cover

Part #240763

The manufacturer no longer makes this part, and there's no substitute part

Glass Panel 239451
#239451

Fascia panel diagram

Glass panel

Part #239451

The manufacturer no longer makes this part, and there's no substitute part

Clamp 421467
#421467

Upper cavity diagram

Clamp

Part #421467

The manufacturer no longer makes this part, and there's no substitute part

Rack 435185
Rack

Part #435185

The manufacturer no longer makes this part, and there's no substitute part

Wall Oven Relay Control Board 489264
#489264

Fascia panel diagram

Wall oven relay control board

Part #489264

The manufacturer no longer makes this part, and there's no substitute part

Reflector 240778
#240778

Upper and lower door diagram

Reflector

Part #240778

The manufacturer no longer makes this part, and there's no substitute part

Spring 420234
Spring

Part #420234

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your wall oven

Choose a symptom to see related wall oven repairs.

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Why won't my wall oven door unlock?

Main causes: bad oven door lock assembly, faulty electronic control board, wiring failure…

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Why won't my wall oven broil?

Main causes: broken broil element, faulty broil burner igniter, control system failure…

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Why won't my wall oven bake?

Main causes: broken bake element, bad bake burner igniter, tripped thermal switch, control system failure…

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Why isn't my wall oven at the temperature I set?

Main causes: faulty oven temperature sensor, control system problem, weak burner igniter, damaged oven element…

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Why doesn't my wall oven work?

Main causes: lack of electrical power, bad electronic control board, faulty oven control thermostat…

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Why won't my wall oven heat?

Main causes: lack of gas supply, broken igniter, tripped circuit breaker, broken oven element, tripped thermal fuse, con…

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Most common repair guides to help fix your wall oven

These step-by-step repair guides will help you safely fix what’s broken on your wall oven.

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How to replace a wall oven door outer glass panel

How to replace a wall oven door outer glass panel

Learn how to replace a damaged outer window panel on your wall oven door with these step-by-step instructions. …

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Repair difficulty
Time required
 45 minutes or less
How to replace a wall oven control thermostat

How to replace a wall oven control thermostat

Get your oven temperature under your control by replacing a faulty oven control thermostat.…

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Repair difficulty
Time required
 60 minutes or less
How to replace a wall oven thermal fuse

How to replace a wall oven thermal fuse

The thermal fuse trips to prevent the over from excessively overheating. The oven won't heat again until you replace the…

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Repair difficulty
Time required
 60 minutes or less

Effective articles & videos to help repair your wall oven

Use the advice and tips in these articles and videos to get the most out of your wall oven.

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Oven rack placement for the best results video

Oven rack placement for the best results video

Learn where to place the rack in your oven for optimal broiling, toasting, baking or roasting.…

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How to repair broken or damaged wires video

How to repair broken or damaged wires video

Learn how to repair broken, frayed or damaged wires in your appliances.…

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How to use a multimeter to test electrical parts video

How to use a multimeter to test electrical parts video

Learn how to use a multimeter to check for wiring problems in an appliance that's not working…

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