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Bosch
Electric Wall Oven

Model # HBN5420UC/02 Official Bosch electric built-in oven

Here are the diagrams and repair parts for Official Bosch HBN5420UC-02 electric built-in oven, as well as links to manuals and error code tables, if available.

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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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ALL PARTS
Showing 10 of 89 parts  |
Control Board 00665239
#101

Control panel diagram

Control board

Part #00665239

Replaced by #00703859

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Manufacturer substitution
This part replaces 00665239. Substitute parts can look different from the original.
$746.68 | 
$12.00 OFF Phone Price : $758.68
In Stock
Wall Oven Cooling Fan Assembly 00665045
#204

Latch asy diagram

Wall oven cooling fan assembly

Part #00665045

$187.14
In Stock
Ring 00423808
#103

Control panel diagram

Ring

Part #00423808

This item is not returnable
$20.34
In Stock
Bracket 00610187
#412

Door diagram

Bracket

Part #00610187

Replaced by #00613179

?
Manufacturer substitution
This part replaces 00610187. Substitute parts can look different from the original.
$23.49
In Stock
Limiter 00612548
#206

Latch asy diagram

Limiter

Part #00612548

Replaced by #00617877

?
Manufacturer substitution
This part replaces 00612548. Substitute parts can look different from the original.
$29.36
In Stock
Bolt 00609082
#418

Door diagram

Bolt

Part #00609082

$14.97
In Stock
Wall Oven Door Handle Screw 00422099
#413

Door diagram

Wall oven door handle screw

Part #00422099

$19.23
In Stock
Thermador Catalyzer 00491572
#303

Inner parts diagram

Thermador catalyzer

Part #00491572

$59.36
In Stock
Wall Oven Wire Harness 00666001
#351

Inner parts diagram

Wall oven wire harness

Part #00666001

$23.77
In Stock
Washer 00426300
#414

Door diagram

Washer

Part #00426300

This item is not returnable
$6.46
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 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. …

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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

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

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