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Maytag
Dishwasher

Model # MDB4040AWW Official Maytag dishwasher

Here are the diagrams and repair parts for Official Maytag MDB4040AWW dishwasher, 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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ALL PARTS
Showing 10 of 205 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
#8A

Door diagram

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
Dishwasher Spray Arm Assembly, Lower 99001788
#2

Pump & motor diagram

Dishwasher spray arm assembly, lower

Part #99001788

Replaced by #WP99001788

?
Manufacturer substitution
This part replaces 99001788. Substitute parts can look different from the original.
$53.71
| 
10% OFF Phone Price : $59.71
In Stock
Dishwasher Water Inlet Valve 99001359
#2

Tub diagram

Dishwasher water inlet valve

Part #99001359

Replaced by #WP99001359

?
Manufacturer substitution
This part replaces 99001359. Substitute parts can look different from the original.
$36.79
| 
14% OFF Phone Price : $42.79
In Stock
Door Switch 903086
#9

Control panel diagram

Door switch

Part #903086

Replaced by #99002254

?
Manufacturer substitution
This part replaces 903086. Substitute parts can look different from the original.
$57.92
| 
9% OFF Phone Price : $63.92
In Stock
Deflector, W 99001885
#15

Tub diagram

Deflector, w

Part #99001885

Replaced by #WP99001885

?
Manufacturer substitution
This part replaces 99001885. Substitute parts can look different from the original.
This item is not returnable
$7.79
| 
11% OFF Phone Price : $8.79
In Stock
Rack Stop 912546
#18

Track & rack assembly diagram

Rack stop

Part #912546

Replaced by #WP99002135

?
Manufacturer substitution
This part replaces 912546. Substitute parts can look different from the original.
This item is not returnable
$6.60
| 
13% OFF Phone Price : $7.60
In Stock
Door Holder 99001077
#5

Control panel diagram

Door holder

Part #99001077

Replaced by #99002254

?
Manufacturer substitution
This part replaces 99001077. Substitute parts can look different from the original.
$57.92
| 
9% OFF Phone Price : $63.92
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

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...

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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...

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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...

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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 ...

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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....

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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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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

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