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Modern Maid
Electric Range

Model # QDU-878A Official Modern Maid electric range

Here are the diagrams and repair parts for Official Modern Maid QDU-878A 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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For DIY troubleshooting advice and repair guides, visit our repair help section.

Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 169 parts  |
Screw 71-02-060
Screw

Part #71-02-060

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

Door Trim 77-04-352
#2

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

Door trim

Part #77-04-352

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

Back Rail 77-04-312
#1B

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

Back rail

Part #77-04-312

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

Burner Box Bottom 24-01-103
#8

Glass top section (qdu-878) diagram

Burner box bottom

Part #24-01-103

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

Element Spacer 53-01-163
#5

Glass top section (qdu-878) diagram

Element spacer

Part #53-01-163

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

Knob, Grille Cover 77-01-037
#16

Main top section (qdu-838) diagram

Knob, grille cover

Part #77-01-037

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

Screw 71-01-113
#1

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

Screw

Part #71-01-113

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

Knob, Surface Switch 77-06-121
Knob, surface switch

Part #77-06-121

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

Oven Front 08-01-157

#NI

All parts diagram

Oven front

Part #08-01-157

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

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 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 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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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 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 bake?

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

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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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