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Bosch
Electric Wall Oven

Model # HBL442AUC Official Bosch wall oven

Here are the diagrams and repair parts for Official Bosch HBL442AUC wall 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.

Owner’s manual
Error Codes

Model diagram and schematic

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Showing 10 of 137 parts  |
Oven Bulb 420228
#420228

Cavity diagram

Oven bulb

Part #420228

Replaced by #00189351

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Manufacturer substitution
This part replaces 420228. Substitute parts can look different from the original.
$25.79 | 
16% OFF Phone Price : $30.79
In Stock
Switch 491312
#491312

Fascia panel diagram

Switch

Part #491312

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

Bracket 420236
#420236

Internal top panel diagram

Bracket

Part #420236

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

Channel 434068
#434068

Cavity diagram

Channel

Part #434068

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

Wall Oven High-limit Thermostat 418676
#418676

Internal top panel diagram

Wall oven high-limit thermostat

Part #418676

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

Rail 491300
#491300

Body diagram

Rail

Part #491300

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

Speed Nut 420255
#420255

Door diagram

Speed nut

Part #420255

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

Support 490363
#490363

Internal top panel diagram

Support

Part #490363

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

Element 434076
#434076

Cavity diagram

Element

Part #434076

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

Locking 490368
#490368

Internal top panel diagram

Locking

Part #490368

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 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 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
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 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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Oven rack placement for the best results video

Oven rack placement for the best results video

Learn where to place the rack in your oven for optimal broiling, toasting, baking or roasting.…

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How to repair broken or damaged wires video

How to repair broken or damaged wires video

Learn how to repair broken, frayed or damaged wires in your appliances.…

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How to use a multimeter to test electrical parts video

How to use a multimeter to test electrical parts video

Learn how to use a multimeter to check for wiring problems in an appliance that's not working…

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