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Bosch
Electric Wall Oven

Model # HBN5450UC/03 Official Bosch electric built-in oven

Here are the diagrams and repair parts for Official Bosch HBN5450UC-03 electric built-in 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 90 parts  |
Cntl Mech 681273
#101

Control panel diagram

Cntl mech

Part #681273

Replaced by #00703859

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Manufacturer substitution
This part replaces 681273. Substitute parts can look different from the original.
$724.93 | 
$12.00 OFF Phone Price : $736.93
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

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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
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
Spacer 427919
#304

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
Control Module 646114
#201

Pcb's assy diagram

Control module

Part #646114

Replaced by #00655359

?
Manufacturer substitution
This part replaces 646114. Substitute parts can look different from the original.
$548.51 | 
$12.00 OFF Phone Price : $560.51
In Stock
Wall Oven Selector Switch Knob 609121
#105

Control panel diagram

Wall oven selector switch knob

Part #609121

Replaced by #00609121

?
Manufacturer substitution
This part replaces 609121. Substitute parts can look different from the original.
$47.99 | 
11% OFF Phone Price : $53.99
In Stock
Element 663805
#307

Oven assy diagram

Element

Part #663805

Replaced by #00663805

?
Manufacturer substitution
This part replaces 663805. Substitute parts can look different from the original.
$78.59 | 
7% OFF Phone Price : $84.59
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…

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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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Wall oven won't heat: troubleshooting thermal switch problems video

Wall oven won't heat: troubleshooting thermal switch problems video

Learn what to do if your Kenmore, Frigidaire or Electrolux wall oven won’t heat up after running a self-cleaning cycle.…

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How to repair arc or burn marks in a microwave video

How to repair arc or burn marks in a microwave video

Find out how to repair microwave arc and burn marks with touch-up paint in this how-to video.…

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Wall oven common questions

Wall oven common questions

Read the questions our experts often hear about wall ovens, and the answers.…

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