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Bosch
Electric Wall Oven

Model # HBN3450UC/04 Official Bosch wall oven

Here are the diagrams and repair parts for Official Bosch HBN3450UC-04 wall oven, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • 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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

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 77 parts  |
Sensor 642855
#307

Oven assy diagram

Sensor

Part #642855

Replaced by #00642855

?
Manufacturer substitution
This part replaces 642855. Substitute parts can look different from the original.
$64.49 | 
9% OFF Phone Price : $70.49
In Stock
Power Supply 663802
#203

Pcb's assy diagram

Power supply

Part #663802

Replaced by #00663802

?
Manufacturer substitution
This part replaces 663802. Substitute parts can look different from the original.
$128.19 | 
9% OFF Phone Price : $140.19
In Stock
Latch 644216
#205

Pcb's assy diagram

Latch

Part #644216

Replaced by #00751505

?
Manufacturer substitution
This part replaces 644216. Substitute parts can look different from the original.
$144.49 | 
8% OFF Phone Price : $156.49
In Stock
Heater 144723
#315

Oven assy diagram

Heater

Part #144723

Replaced by #00144723

?
Manufacturer substitution
This part replaces 144723. Substitute parts can look different from the original.
$108.79 | 
10% OFF Phone Price : $120.79
In Stock
Hinge Kit 646948
#407

Door assy diagram

Hinge kit

Part #646948

Replaced by #00650874

?
Manufacturer substitution
This part replaces 646948. Substitute parts can look different from the original.
$308.86 | 
$12.00 OFF Phone Price : $320.86
In Stock
Terminal Box 436364
#202

Pcb's assy diagram

Terminal box

Part #436364

Replaced by #00436364

?
Manufacturer substitution
This part replaces 436364. Substitute parts can look different from the original.
$32.67
In Stock
Spacer 427919
#305

Oven assy diagram

Spacer

Part #427919

Replaced by #00427919

?
Manufacturer substitution
This part replaces 427919. Substitute parts can look different from the original.
$19.80
In Stock
Motor 642845
#302

Oven assy diagram

Motor

Part #642845

Replaced by #00642845

?
Manufacturer substitution
This part replaces 642845. Substitute parts can look different from the original.
$165.59 | 
7% OFF Phone Price : $177.59
In Stock
Connection 414692
#NI

Cabinet diagram

Connection

Part #414692

Replaced by #00414692

?
Manufacturer substitution
This part replaces 414692. Substitute parts can look different from the original.
$49.31
In Stock
Catalyzer 491572
#303

Oven assy diagram

Catalyzer

Part #491572

Replaced by #00491572

?
Manufacturer substitution
This part replaces 491572. Substitute parts can look different from the original.
$59.36
In Stock

Most common symptoms to help you fix your wall oven

Choose a symptom to see related wall oven repairs.

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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 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 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 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 heat?

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

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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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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 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…

Read more
Repair difficulty
Time required
 60 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 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. …

Read more
Repair difficulty
Time required
 45 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

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

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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