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Bosch
Electric Wall Oven

Model # HBN3450UC/03 Official Bosch wall oven

Here are the diagrams and repair parts for Official Bosch HBN3450UC-03 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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ALL PARTS
Showing 10 of 78 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
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
Temperature Limit 612548
#206

Pcb's 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
Fan 665045
#204

Pcb's 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
Oven Harness 663791
#NI

Control panel diagram

Oven harness

Part #663791

Replaced by #00663791

?
Manufacturer substitution
This part replaces 663791. Substitute parts can look different from the original.
$32.67
In Stock
Control Module 646113
#201

Pcb's assy diagram

Control module

Part #646113

Replaced by #00655359

?
Manufacturer substitution
This part replaces 646113. Substitute parts can look different from the original.
$548.51 | 
$12.00 OFF Phone Price : $560.51
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
Trim Plate 682495
#502

Cabinet diagram

Trim plate

Part #682495

Replaced by #00682495

?
Manufacturer substitution
This part replaces 682495. Substitute parts can look different from the original.
$192.75
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
Inner Door 478701
#402

Door assy diagram

Inner door

Part #478701

Replaced by #00688544

?
Manufacturer substitution
This part replaces 478701. Substitute parts can look different from the original.
$332.33 | 
$12.00 OFF Phone Price : $344.33
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 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 won't my wall oven broil?

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

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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 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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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 the thermal switch in a wall oven

How to replace the thermal switch in a wall oven

If the oven won't heat after resetting the thermal switch, replace the thermal switch.…

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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
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 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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