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Maytag
Dishwasher

Model # GDU400B Official Maytag dishwasher

Here are the diagrams and repair parts for Official Maytag GDU400B dishwasher, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 179 parts  |
Clamp Spring 911856
#3

Tub diagram

Clamp spring

Part #911856

Replaced by #WP596669

?
Manufacturer substitution
This part replaces 911856. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$4.37 | 
19% OFF Phone Price : $5.37
In Stock
Plate Screw 912365
Plate screw

Part #912365

Replaced by #WP489128

?
Manufacturer substitution
This part replaces 912365. Substitute parts can look different from the original.
This item is not returnable
$8.12 | 
11% OFF Phone Price : $9.12
In Stock
Door Screw 912620
Door screw

Part #912620

Replaced by #WPY912620

?
Manufacturer substitution
This part replaces 912620. Substitute parts can look different from the original.
This item is not returnable
$3.95 | 
20% OFF Phone Price : $4.95
In Stock
Wax Motor 902899
#1

Rinse aid & soap dispenser diagram

Wax motor

Part #902899

Replaced by #WP902899

?
Manufacturer substitution
This part replaces 902899. Substitute parts can look different from the original.
$37.61 | 
14% OFF Phone Price : $43.61
In Stock
Dishwasher Dishrack Wheel 903093
#2

Track & rack assembly diagram

Dishwasher dishrack wheel

Part #903093

Replaced by #WP903093

?
Manufacturer substitution
This part replaces 903093. Substitute parts can look different from the original.
This item is not returnable
$10.49 | 
16% OFF Phone Price : $12.49
In Stock
Dishwasher Spray Arm 99001586
#34

Tub diagram

Dishwasher spray arm

Part #99001586

Replaced by #WP99001586

?
Manufacturer substitution
This part replaces 99001586. Substitute parts can look different from the original.
This item is not returnable
$6.49 | 
13% OFF Phone Price : $7.49
In Stock
Float 99001004
#28

Tub diagram

Float

Part #99001004

Replaced by #WP99002363

?
Manufacturer substitution
This part replaces 99001004. Substitute parts can look different from the original.
This item is not returnable
$6.49 | 
13% OFF Phone Price : $7.49
In Stock
Latch Handle (black) 99001078
#11

Control panel diagram

Latch handle (black)

Part #99001078

Replaced by #W10834433

?
Manufacturer substitution
This part replaces 99001078. Substitute parts can look different from the original.
$56.79 | 
10% OFF Phone Price : $62.79
In Stock
Solenoid, Pu 904023
#5

Pump & motor diagram

Solenoid, pu

Part #904023

Replaced by #WP6-904023

?
Manufacturer substitution
This part replaces 904023. Substitute parts can look different from the original.
$87.49 | 
6% OFF Phone Price : $93.49
In Stock
Retainer 99001288
#3

Rinse aid & soap dispenser diagram

Retainer

Part #99001288

Replaced by #WP99001288

?
Manufacturer substitution
This part replaces 99001288. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock

Most common symptoms to help you fix your dishwashers

Choose a symptom to see related dishwasher repairs.

View all

Why is my dishwasher noisy?

Main causes: glass or popcorn kernel stuck in the chopper blade, drain line vibrating against the cabinet, debris in was…

Read more

Why don't my dishes get dry?

Main causes: not using rinse aid, rinse aid dispenser failure, broken heating element, malfunctioning vent, drying fan f…

Read more

Why is my dishwasher leaking?

Main causes: damaged or stuck spray arm, leaking door seal, damaged door hinge, leaky heating element water seal, cracke…

Read more

Why won't my dishwasher drain?

Main causes: clogged kitchen sink drain, clogged drain hose, drain check valve damaged, drain pump failure, control syst…

Read more

Why does my dishwasher door drop open too fast?

Main causes: broken door spring, damaged or broken door hinge…

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Why does my dishwasher stop mid-cycle?

Main causes: broken door latch, tripped circuit breaker, broken heating element, faulty vent fan, sensor failure, contro…

Read more

Why can't I adjust the dishwasher rack height?

Main cause: damaged rack height adjuster…

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Why isn't my dishwasher getting dishes clean?

Main causes: improper loading, low water temperature, improper detergent dosage, detergent dispenser failure, spray arm …

Read more

Why won't my dishwasher start?

Main causes: light switch beside the sink turned off, lack of power, bad dishwasher door switch, control system failure,…

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Most common repair guides to help fix your dishwashers

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

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How to replace a dishwasher high-limit thermostat

How to replace a dishwasher high-limit thermostat

Follow these steps to replace the high-limit thermostat in your dishwasher if prevents the heating element from heating.…

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace a dishwasher door outer panel

How to replace a dishwasher door outer panel

If your dishwasher door is dented or you want it to match your cabinets or other appliances, this guide shows how to rep…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a dishwasher thermal fuse

How to replace a dishwasher thermal fuse

A completely dead control panel often indicates that the thermal fuse on the electronic control board is blown; follow t…

Read more
Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your dishwashers

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

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How to clean and maintain your dishwasher

How to clean and maintain your dishwasher

Get tips for cleaning and maintaining your dishwasher…

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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.…

Read more
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Top questions about Sears and Sears PartsDirect

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