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Bosch
Electric Wall Oven

Model # HBN5450UC/08 Official Bosch electric built-in oven

Here are the diagrams and repair parts for Official Bosch HBN5450UC-08 electric built-in oven, as well as links to manuals and error code tables, if available.

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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 88 parts  |
Sensor 642855
#306

Cavity 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
Oven Electronic Control Board 659614
#201

Pcb assy diagram

Oven electronic control board

Part #659614

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

Oven Latch 751505
#205

Pcb assy diagram

Oven latch

Part #751505

Replaced by #00751505

?
Manufacturer substitution
This part replaces 751505. Substitute parts can look different from the original.
$144.49 | 
8% OFF Phone Price : $156.49
In Stock
Temperature Limit 612548
#206

Pcb assy diagram

Temperature limit

Part #612548

Replaced by #00617877

?
Manufacturer substitution
This part replaces 612548. Substitute parts can look different from the original.
$29.36
In Stock
Wall Oven Selector Switch Knob 609121
#105

Control panel assy 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
Ring 423808
#103

Control panel assy diagram

Ring

Part #423808

Replaced by #00423808

?
Manufacturer substitution
This part replaces 423808. Substitute parts can look different from the original.
This item is not returnable
$20.34
In Stock
Fan 665045
#204

Pcb assy diagram

Fan

Part #665045

Replaced by #00665045

?
Manufacturer substitution
This part replaces 665045. Substitute parts can look different from the original.
$187.14
In Stock
Bracket 613178
#411

Door assy diagram

Bracket

Part #613178

Replaced by #00613178

?
Manufacturer substitution
This part replaces 613178. Substitute parts can look different from the original.
$30.31 | 
17% OFF Phone Price : $36.31
In Stock
Element 663805
#307

Cavity 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
Trim Plate 680904
#405

Door assy diagram

Trim plate

Part #680904

Replaced by #00680904

?
Manufacturer substitution
This part replaces 680904. Substitute parts can look different from the original.
$214.01 | 
5% OFF Phone Price : $226.01
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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5 Holiday Cleaning Tasks Essential to Boosting Your Home’s Image

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

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Top questions about Sears and Sears PartsDirect

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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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