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Bosch
Upright Freezer

Model # B18IW50NSP/06 Official Bosch freezer

Here are the diagrams and repair parts for Official Bosch B18IW50NSP-06 freezer, 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.

Error Codes

Model diagram and schematic

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Showing 10 of 113 parts  |
Fan 643804
#434

Compressor diagram

Fan

Part #643804

Replaced by #00652338

?
Manufacturer substitution
This part replaces 643804. Substitute parts can look different from the original.
$97.79 | 
11% OFF Phone Price : $109.79
In Stock
Filter 607661
#132

Cabinet parts diagram

Filter

Part #607661

Replaced by #00636459

?
Manufacturer substitution
This part replaces 607661. Substitute parts can look different from the original.

Get free shipping with Automatic Reorder

$30.19 | 
17% OFF Phone Price : $36.19
In Stock
Switch 604020
#126

Cabinet parts diagram

Switch

Part #604020

Replaced by #00604020

?
Manufacturer substitution
This part replaces 604020. Substitute parts can look different from the original.
$18.94
In Stock
Capacitor 605603
#423

Compressor diagram

Capacitor

Part #605603

Replaced by #00632035

?
Manufacturer substitution
This part replaces 605603. Substitute parts can look different from the original.
$25.16
In Stock
Fixing Kit 604240
#209

Door assy diagram

Fixing kit

Part #604240

Replaced by #00635355

?
Manufacturer substitution
This part replaces 604240. Substitute parts can look different from the original.
$9.06
In Stock
Fixture 605404
#437

Compressor diagram

Fixture

Part #605404

Replaced by #00605404

?
Manufacturer substitution
This part replaces 605404. Substitute parts can look different from the original.
This item is not returnable
$5.26
In Stock
Seal 244219
#214

Door assy diagram

Seal

Part #244219

Replaced by #00716383

?
Manufacturer substitution
This part replaces 244219. Substitute parts can look different from the original.
$131.79 | 
8% OFF Phone Price : $143.79
In Stock
Switch 604241
#210

Door assy diagram

Switch

Part #604241

Replaced by #00604241

?
Manufacturer substitution
This part replaces 604241. Substitute parts can look different from the original.
$11.60
In Stock
Transformer 499846
#408

Compressor diagram

Transformer

Part #499846

Replaced by #00499846

?
Manufacturer substitution
This part replaces 499846. Substitute parts can look different from the original.
$424.93
In Stock
Support 661226
#510

Molding diagram

Support

Part #661226

Replaced by #00661226

?
Manufacturer substitution
This part replaces 661226. Substitute parts can look different from the original.
$12.71
In Stock

Most common symptoms to help you fix your freestanding freezers

Choose a symptom to see related freezer repairs.

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What should I do when my freezer's high-temperature alarm sounds?

Main causes: lack of power, bad compressor, refrigerant leak, bad thermistor, defrost system failure, dirty condenser co…

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Why is my freezer hot on the outside?

Main causes: dirty condenser coils, condenser fan failure, dirty bottom front grill, leaky door or lid gasket…

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Why is my freezer too warm?

Main causes: excessive frost, bad defrost heater, bad defrost bi-metal, control system failure, low refrigerant charge, …

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Why don't the lights in my freezer work?

Main causes: burned out light bulb, bad door or lid switch, faulty LED light board, wiring failure, control system failu…

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Why does my freezer have a lot of frost inside?

Main causes: damaged door or lid gasket, cracked cabinet liner, bad defrost bi-metal thermostat, broken defrost heater, …

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Why isn't my freezer cooling?

Main causes: compressor failure, no refrigerant, faulty sensor, control failure, broken defrost heater, bad defrost bi-m…

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Why is my freezer so noisy?

Main causes: leaky door or lid gasket, broken defrost heater, bad defrost bi-metal thermostat, defrost control failure, …

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Why isn't my freezer running?

Main causes: lack of power, control system failure, broken compressor start relay, locked up compressor, compressor moto…

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Repair guides for upright freezers

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How to replace a freezer control panel

How to replace a freezer control panel

A freezer control panel that doesn’t show the temperature or respond when you press the buttons could be broken. This DI…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a freezer door switch

How to replace a freezer door switch

When the door switch fails, the freezer can’t detect that the door is closed. Follow the steps in this repair guide to r…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a freezer thermistor

How to replace a freezer thermistor

When the thermistor can’t sense the freezer temperature, the freezer is colder or warmer than the set temperature. Follo…

Read more
Repair difficulty
Time required
 45 minutes or less

Effective articles & videos to help repair your freestanding freezers

Use the advice and tips in these articles and videos to get the most out of your freezer.

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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

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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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