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Bosch
Electric Wall Oven

Model # HBN446AUC Official Bosch wall oven

Here are the diagrams and repair parts for Official Bosch HBN446AUC 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.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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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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Showing 10 of 135 parts  |
Oven Bulb 420228
#420228

Cavity diagram

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 | 
19% OFF Phone Price : $31.79
In Stock
Screw 420218
#420218

Cavity diagram

Screw

Part #420218

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

Insulation Cover 490347
#490347

Body diagram

Insulation cover

Part #490347

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

Oven Element 239404
#239404

Cavity diagram

Oven element

Part #239404

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

Door Liner 239411
#239411

Door diagram

Door liner

Part #239411

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

Rear Case 240810
#240810

Body diagram

Rear case

Part #240810

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

Screw 420226
#420226

Cavity diagram

Screw

Part #420226

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

Bracket 420236
#420236

Internal top panel diagram

Bracket

Part #420236

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

Oven Door 418436
#418436

Door diagram

Oven door

Part #418436

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

Hinge 491279
#491279

Body diagram

Hinge

Part #491279

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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5 Holiday Cleaning Tasks Essential to Boosting Your Home’s Image

5 Holiday Cleaning Tasks Essential to Boosting Your Home’s Image

Get tips on completing essential holiday cleaning tasks to brighten your home.…

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Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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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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