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Modern Maid
Electric Range

Model # QDU-878B Official Modern Maid electric range

Here are the diagrams and repair parts for Official Modern Maid QDU-878B electric range, 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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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 169 parts  |
Lamp Socket 74-08-063
#31

Cabinet section (qdu-838) (qdu-858) (qdu-878) diagram

Lamp socket

Part #74-08-063

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

Knurl Nut 71-03-027
Knurl nut

Part #71-03-027

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

Screw 71-01-104
#5

Door latch assembly (qdu-838) (qdu-858) (qdu-878) diagram

Screw

Part #71-01-104

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

Terminal Block 74-08-076
#2

High voltage section (qdu-838) (qdu-858) (qdu-878) diagram

Terminal block

Part #74-08-076

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

Door Panel - Coffee 12-01-141
#3B

Oven door assembly (qdu-838) (qdu-858) (qdu-878) diagram

Door panel - coffee

Part #12-01-141

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

Insulation, 2 X 21.5 X 26 72-01-044
#6

Cabinet section (qdu-838) (qdu-858) (qdu-878) diagram

Insulation, 2 x 21.5 x 26

Part #72-01-044

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

Bake Element 74-06-186
#28

Cabinet section (qdu-838) (qdu-858) (qdu-878) diagram

Bake element

Part #74-06-186

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

Main Top 04-02-185
#1

Glass top section (qdu-878) diagram

Main top

Part #04-02-185

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

Door Spring Mounting Bracket 44-01-670
#12

Cabinet section (qdu-838) (qdu-858) (qdu-878) diagram

Door spring mounting bracket

Part #44-01-670

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

Oven Light Switch 74-03-056
Oven light switch

Part #74-03-056

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

Most common symptoms to help you fix your ranges

Choose a symptom to see related range repairs.

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Why can't I unlock my range's oven door?

Main causes: broken oven door lock assembly, wiring failure, electronic control board problem…

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Why won't my range's oven bake?

Main causes: bad bake element, broken burner igniter, control system failure, blown thermal fuse, faulty temperature sen…

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How do I get rid of streaks on my range's oven window?

Main causes: food splatters, spilling food on the oven door, allowing liquid to drip through oven door vent when cleanin…

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Why is my range's oven temperature wrong?

Main causes: faulty temperature sensor, electronic control board problem, control thermostat failure, weak burner ignite…

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Why doesn't my range's oven broiler work?

Main causes: broken broiler element, weak or broken broil burner igniter, control system failure, faulty temperature sen…

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Why won't my range's oven heat?

Main causes: power supply problem, control thermostat or electronic control board failure, broken element, bad burner ig…

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Why isn't my range working?

Main causes: power supply failure, blown thermal fuse, bad relay control board, damaged terminal block, wiring failure…

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Most common repair guides to help fix your ranges

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

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How to replace a range oven door switch

How to replace a range oven door switch

The oven door switch detects whether the oven door is closed and helps control the oven light. Replace the switch if it …

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Repair difficulty
Time required
 30 minutes or less
How to replace a range oven door lock assembly

How to replace a range oven door lock assembly

Oven door not locking? You can replace the lock assembly in less than 30 minutes. Here's how.…

Read more
Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your ranges

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

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How to clean and maintain your stove

Learn how to clean and maintain your stove to keep it in top shape.…

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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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