Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Whirlpool
Countertop Microwave

Model # MT4078SKQ0 Official Whirlpool countertop microwave

Here are the diagrams and repair parts for Official Whirlpool MT4078SKQ0 countertop microwave, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • 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”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 65 parts  |
Voltage Wire 8184295
#8

Oven interior diagram

Voltage wire

Part #8184295

Replaced by #WP8205489

?
Manufacturer substitution
This part replaces 8184295. Substitute parts can look different from the original.
$32.49 | 
16% OFF Phone Price : $38.49
In Stock
Spring 8184272
#3

Control panel diagram

Spring

Part #8184272

Replaced by #WP4158178

?
Manufacturer substitution
This part replaces 8184272. Substitute parts can look different from the original.
This item is not returnable
$6.09 | 
14% OFF Phone Price : $7.09
In Stock
Switch 8184368
#4

Control panel diagram

Switch

Part #8184368

$94.04
In Stock
Fan Blade 8184292
#1

Oven interior diagram

Fan blade

Part #8184292

$36.16
In Stock
Switch 8183561
#3

Latch board diagram

Switch

Part #8183561

Replaced by #4392027

?
Manufacturer substitution
This part replaces 8183561. Substitute parts can look different from the original.
$69.11 | 
8% OFF Phone Price : $75.11
In Stock
Microwave Screw 4358489
#21

Oven interior diagram

Microwave screw

Part #4358489

Replaced by #4344826

?
Manufacturer substitution
This part replaces 4358489. Substitute parts can look different from the original.
$12.49
In Stock
Screw 4358192
#16

Oven cavity diagram

Screw

Part #4358192

Replaced by #W11380570

?
Manufacturer substitution
This part replaces 4358192. Substitute parts can look different from the original.
This item is not returnable
$18.19 | 
10% OFF Phone Price : $20.19
In Stock
Switch 4158771
#4

Latch board diagram

Switch

Part #4158771

Replaced by #4392027

?
Manufacturer substitution
This part replaces 4158771. Substitute parts can look different from the original.
$69.11 | 
8% OFF Phone Price : $75.11
In Stock
Turntable Motor 8184375
#11

Oven cavity diagram

Turntable motor

Part #8184375

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

Cook Tray 4359722
#6

Oven cavity diagram

Cook tray

Part #4359722

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

Effective articles & videos to help repair your microwaves

View all
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
Introducing new technical repair content that we’re developing for the Sears Technical Institute

Introducing new technical repair content that we’re developing for the Sears Technical Institute

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

Read more
Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

Read more

Parts & More