Free standard ground shipping within the 48 contiguous states with any water filter subscription. Find my filter

Open Hamburger Menu
Sears Parts Direct
Tips to find your model number

Whirlpool MT4078SPB1 countertop microwave Parts

Here are the diagrams and repair parts for Whirlpool MT4078SPB1 countertop microwave, as well as links to manuals and error code tables, if available.

Whirlpool MT4078SPB1 countertop microwave
By Schematic
By Part
SELECT DIAGRAM
?

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

Browse Parts forMT4078SPB1 Microwaves

  • Control Panel for Whirlpool MT4078SPB1 - Part 8205472

    Control panel parts diagram

    Control Panel

    Part #8205472

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

  • Cap Fuse for Whirlpool MT4078SPB1 - Part 8205483

    Oven interior parts diagram

    Cap Fuse

    Part #8205483

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

  • Mounting Bracket for Whirlpool MT4078SPB1 - Part 8205477

    Latch board parts diagram

    Mounting Bracket

    Part #8205477

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

  • Installation Instructions for Whirlpool MT4078SPB1 - Part 8204864

    Door parts diagram

    Installation Instructions

    Part #8204864

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

  • Base for Whirlpool MT4078SPB1 - Part 8205491

    Base plate parts diagram

    Base

    Part #8205491

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

  • Fuse for Whirlpool MT4078SPB1 - Part 4358704

    Oven interior parts diagram

    Fuse

    Part #4358704

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

  • Magnetron for Whirlpool MT4078SPB1 - Part 8205486

    Oven interior parts diagram

    Magnetron

    Part #8205486

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

  • Screw for Whirlpool MT4078SPB1 - Part 4358271

    Screw

    Part #4358271

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

  • Button Plug for Whirlpool MT4078SPB1 - Part 4358857

    Oven cavity parts diagram

    Button Plug

    Part #4358857

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

  • Wrapper Cabinet for Whirlpool MT4078SPB1 - Part 8205475

    Oven cavity parts diagram

    Wrapper Cabinet

    Part #8205475

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

Effective articles & videos to help repair your microwaves

Are DIY appliance repairs safe?

Are DIY appliance repairs safe?

Find out how to stay safe when repairing your appliances....

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....

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....

Parts & More

Bottom-Mount Refrigerator
Camcorder
Dryer
Electric Range
Evaporative Cooler
Freestanding Freezer
Front-Engine Lawn Tractor
Gas Chainsaw
Gas Range
Grass Catcher Attachment
Parts
Refrigerator
Storm & Screen Doors
Table Saw
Tools & Attachment
Top-Mount Refrigerator
Washer