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Bosch
Electric Wall Oven

Model # HBN742AUC Official Bosch wall oven

Here are the diagrams and repair parts for Official Bosch HBN742AUC wall 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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ALL PARTS
Showing 10 of 133 parts  |
Oven Bulb 420228
#420228

Cavity diagram

Oven bulb

Part #420228

Replaced by #00189351

?
Manufacturer substitution
This part replaces 420228. Substitute parts can look different from the original.
$25.79 | 
19% OFF Phone Price : $31.79
In Stock
Switch-doo 418463
#418463

Upper internal panel diagram

Switch-doo

Part #418463

Replaced by #00614766

?
Manufacturer substitution
This part replaces 418463. Substitute parts can look different from the original.
$25.84
In Stock
Wall Oven Filter 489268
#489268

Fascia panel diagram

Wall oven filter

Part #489268

Replaced by #00489268

?
Manufacturer substitution
This part replaces 489268. Substitute parts can look different from the original.
$29.04 | 
17% OFF Phone Price : $35.04
In Stock
Oven Panel 434078
#434078

Door diagram

Oven panel

Part #434078

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

Washer 420251
#420251

Door diagram

Washer

Part #420251

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

Cover, L 240811
#240811

Body diagram

Cover, l

Part #240811

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

Nut 420252
#420252

Door diagram

Nut

Part #420252

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

Wall Oven Door Hinge 421026
#421026

Door diagram

Wall oven door hinge

Part #421026

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

Spacer 239474
#239474

Body diagram

Spacer

Part #239474

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

Elbow 420183
#420183

Body diagram

Elbow

Part #420183

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

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 bake?

Main causes: broken bake element, bad bake burner igniter, tripped thermal switch, control system failure…

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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 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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Why won't my wall oven broil?

Main causes: broken broil element, faulty broil burner igniter, 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 wall oven door hinges

How to replace wall oven door hinges

If your oven door flops open fast, it's time to replace the hinges. Follow these step-by-step instructions to do it your…

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Repair difficulty
Time required
 15 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

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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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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