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Bosch
Dryer

Model # WTMC3321US/03 Official Bosch dryer

Here are the diagrams and repair parts for Official Bosch WTMC3321US-03 dryer, 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.

Owner’s manual
Error Codes

Model diagram and schematic

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PART LIST
Showing 10 of 94 parts  |
Dryer Lint Screen

#312

All parts diagram

Dryer lint screen

Part #436476

Replaced by #00436476

?
Manufacturer substitution
This part replaces 436476. Substitute parts can look different from the original.
$26.59 | 
16% OFF Phone Price : $31.59
In Stock
Dryer Door Hinge (replaces 491647)

#218

All parts diagram

Dryer door hinge

Part #491647

Replaced by #00491647

?
Manufacturer substitution
This part replaces 491647. Substitute parts can look different from the original.
$35.89 | 
12% OFF Phone Price : $40.89
In Stock
Dryer Rear Bearing

#303

All parts diagram

Bearing

Part #491607

Replaced by #00618931

?
Manufacturer substitution
This part replaces 491607. Substitute parts can look different from the original.
This item is not returnable
$26.59 | 
16% OFF Phone Price : $31.59
In Stock
Dryer Drum Support Roller (replaces 422200)

#314

All parts diagram

Dryer drum support roller

Part #422200

Replaced by #00422200

?
Manufacturer substitution
This part replaces 422200. Substitute parts can look different from the original.
$38.99 | 
11% OFF Phone Price : $43.99
In Stock
Dryer Door Strike (replaces 491673)

#224

All parts diagram

Door latch

Part #491673

Replaced by #00491673

?
Manufacturer substitution
This part replaces 491673. Substitute parts can look different from the original.
$54.79 | 
8% OFF Phone Price : $59.79
In Stock
Dryer Drum Lamp

#319

All parts diagram

Dryer drum lamp

Part #422173

This item is not returnable
$20.34
Back Order
Dryer Thermistor (replaces 00154166)

#324

All parts diagram

Ntc

Part #154166

Replaced by #10010119

?
Manufacturer substitution
This part replaces 154166. Substitute parts can look different from the original.
$34.11
In Stock
Dryer Belt Switch and High-Limit Thermostat Wire Harness (replaces 421685)
Dryer belt switch and high-limit thermostat wire harness

Part #421685

Replaced by #00421685

?
Manufacturer substitution
This part replaces 421685. Substitute parts can look different from the original.
$89.07
In Stock
Cap Cover

#216

All parts diagram

Dryer cover

Part #424036

Replaced by #00424036

?
Manufacturer substitution
This part replaces 424036. Substitute parts can look different from the original.
This item is not returnable
$5.66
In Stock
Laundry Appliance Screw

#220

All parts diagram

Screw

Part #422243

Replaced by #00422243

?
Manufacturer substitution
This part replaces 422243. Substitute parts can look different from the original.
This item is not returnable
$3.69
In Stock

Symptoms common to all dryers

Choose a symptom to see related dryer repairs.

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April 20, 2023

Why won't my dryer start?

By Lyle Weischwill

Main causes: door switch failure, lack of power, broken belt, blown thermal fuse, bad drive motor, control system failur…

Read more
April 20, 2023

Why is my dryer making a rattling noise?

By Lyle Weischwill

Main causes: bad drum support roller, damaged idler pulley, broken blower fan blade, worn drum glide bearing, bad drive …

Read more
April 19, 2023

Why won't my dryer heat?

By Lyle Weischwill

Main causes: bad gas valve coils, broken heating element, tripped safety thermostat or fuse, bad operating thermostat, c…

Read more
April 19, 2023

Why won't my dryer door stay shut?

By Lyle Weischwill

Main causes: damaged door strike, worn door catch…

Read more
April 19, 2023

Why won't my dryer shut off?

By Lyle Weischwill

Main causes: bad timer or electronic control board, door switch failure…

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April 19, 2023

Why doesn't my dryer work?

By Lyle Weischwill

Main causes: lack of electrical power, bad power cord, wiring failure, bad control board, blown thermal fuse, bad door s…

Read more
April 20, 2023

Why does my dryer start then stop?

By Lyle Weischwill

Main causes: clogged exhaust vent, bad motor relay, loose dryer door catch, bad door switch, control system failure, fau…

Read more
April 19, 2023

Why isn't my dryer getting my laundry dry?

By Lyle Weischwill

Main causes: clogged exhaust system, heating system failure, deposits on moisture sensor, control system failure…

Read more

Repair guides common to all dryers

These step-by-step repair guides will help you safely fix what’s broken on your dryer.

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How to replace a dryer drum support roller
August 01, 2014
By Lyle Weischwill

How to replace a dryer drum support roller

If your dryer thumps or squeals, replace the drum support roller to restore quiet to your home.…

Read more
Repair difficulty
Time required
 90 minutes or less
How to replace a dryer thermistor
August 01, 2014
By Lyle Weischwill

How to replace a dryer thermistor

The thermistor senses the air temperature in the dryer. If your dryer overheats or doesn't heat at all, the thermistor …

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace a dryer idler pulley
August 01, 2014
By Lyle Weischwill

How to replace a dryer idler pulley

The idler pulley exerts pressure keeps the drive belt tight so it can rotate the drum. A worn idler pulley squeals or sq…

Read more
Repair difficulty
Time required
 90 minutes or less

Articles and videos common to all dryers

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

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How to use your clothes dryer efficiently
June 09, 2023
By Lyle Weischwill

How to use your clothes dryer efficiently

Get expert tips on using your dryer efficiently to save energy.…

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How to repair broken or damaged wires video
October 26, 2016
By Lyle Weischwill

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
January 18, 2016
By Lyle Weischwill

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…

Read more

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