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

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Whirlpool
Electric Range

Model # RM778PXT3 Official Whirlpool electric range

Here are the diagrams and repair parts for Official Whirlpool RM778PXT3 electric range, 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.

Error Codes

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 245 parts  |
Light Bulb 816389
#4

Lower oven diagram

Light bulb

Part #816389

Replaced by #40A15

?
Manufacturer substitution
This part replaces 816389. Substitute parts can look different from the original.
BEST SELLER
$15.16 | 
12% OFF Phone Price : $17.16
In Stock
Magnetron 660595
#26

Magnetron and air flow diagram

Magnetron

Part #660595

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

Spray W 799343

#NI

All parts diagram

Spray w

Part #799343

Replaced by #350930

?
Manufacturer substitution
This part replaces 799343. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$15.69 | 
11% OFF Phone Price : $17.69
In Stock
Range Screw 308685
Range screw

Part #308685

Replaced by #WP308685

?
Manufacturer substitution
This part replaces 308685. 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
Touchup Al 72107

#NI

All parts diagram

Touchup al

Part #72107

Replaced by #WB32X106

?
Manufacturer substitution
This part replaces 72107. Substitute parts can look different from the original.
BEST SELLER
$13.87 | 
13% OFF Phone Price : $15.87
In Stock
Adhesive 482338

#NI

All parts diagram

Adhesive

Part #482338

Replaced by #WP482338

?
Manufacturer substitution
This part replaces 482338. Substitute parts can look different from the original.
$31.27 | 
16% OFF Phone Price : $37.27
In Stock
Control Knob 310834
#38

Control panel and latch diagram

Control knob

Part #310834

Replaced by #WP3150371

?
Manufacturer substitution
This part replaces 310834. Substitute parts can look different from the original.
This item is not returnable
$16.12 | 
11% OFF Phone Price : $18.12
In Stock
Screw 311722
#37

Door and latch diagram

Screw

Part #311722

Replaced by #WP489128

?
Manufacturer substitution
This part replaces 311722. Substitute parts can look different from the original.
This item is not returnable
$8.12 | 
11% OFF Phone Price : $9.12
In Stock
Touchup Ng 72110

#NI

All parts diagram

Touchup ng

Part #72110

Replaced by #72110

?
Manufacturer substitution
This part replaces 72110. Substitute parts can look different from the original.
This item is not returnable
$13.24 | 
13% OFF Phone Price : $15.24
In Stock
Light Socket 877803
#3

Lower oven diagram

Light socket

Part #877803

Replaced by #W10856866

?
Manufacturer substitution
This part replaces 877803. Substitute parts can look different from the original.
This item is not returnable
$6.49 | 
13% OFF Phone Price : $7.49
In Stock

RECOMMENDED MAINTENANCE PARTS AND ACCESSORIES

Most common symptoms to help you fix your ranges

Choose a symptom to see related range repairs.

View all

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

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

Read more

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…

Read more

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…

Read more

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…

Read more

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…

Read more

Why is my range's oven temperature wrong?

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

Read more

Why isn't my range working?

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

Read more

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.

View all
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 …

Read more
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.

View all
How to clean and maintain your stove

How to clean and maintain your stove

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

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
Oven door won't open: troubleshooting door lock problems on a range video

Oven door won't open: troubleshooting door lock problems on a range video

Troubleshoot and repair problems with your range when your oven door locks shut and you can't get it open.…

Read more

Parts & More