Parts for RM778PXT4 — Whirlpool Range

We found 16 parts confirmed to fit the Whirlpool Range RM778PXT4.

Compatibility table

Prices shown are an informational reference range only, not an offer or an Amazon price — RepairKitHub does not sell parts directly. Each part links to an Amazon search so you can compare current listings yourself.

Common failure areas on this model

The confirmed parts above group into a handful of failure areas. Here is what each points to and how to check it before you order anything.

Storage, trim and cosmetic hardware

Symptom: A cracked shelf, broken door bin, worn hinge, or missing trim piece -- cosmetic and storage wear rather than a functional breakdown.

Check: Match the physical dimensions and mounting tabs of the old part before ordering; these pieces are often model-specific even between visually similar models.

Parts in this group on RM778PXT4: 816437 (Broiler Pan), 487010 (DEFLECTOR, HEAT SCREW, #6X18X1/4 (3)), 308685 (Range Screw), WP3150371 (Range Control Knob).

General hardware and mounting parts

Symptom: A small mechanical or mounting part has failed, cracked, or gone missing.

Check: Compare the physical shape and mounting points to the original piece, and confirm the exact part number against your model plate before ordering.

Parts in this group on RM778PXT4: 816720 (Ic Washer Blade), 241212 (Block), 240132 (Insulation), 261514 (Insulation), 72110 (Washer Touch-Up Paint (Gold)), 799343 (Touch-Up Paint (White)), 72107 (Touchup Al), 72032 (Touch-up Paint - Black), 72017 (Touch-Up Paint - White).

Interior lighting

Symptom: The interior light doesn't turn on when the door opens.

Check: Confirm power is reaching the socket, then check the door-activated light switch before assuming the bulb itself is at fault.

Parts in this group on RM778PXT4: 816389 (Light Bulb), W10856866 (Range Oven Light Socket), WP8189867 (Light Switch Kit).

Before you buy

Match RM778PXT4 exactly against the model and serial plate on the appliance itself before ordering anything — a single mismatched character can point to a different production run with different parts. Then check the part number printed or stamped on the part you are replacing against the part numbers in the table above; the printed number is the most reliable way to confirm fitment when a model has gone through multiple production runs. RepairKitHub does not sell parts directly — every part link above routes to an Amazon search for that part number so you can compare current listings and sellers yourself.

How to confirm this is your model

On most ranges, the model and serial plate sits behind the storage drawer or on the door frame. Match every character exactly, including letters and dashes at the end — appliance model numbers often have similar prefixes but different suffixes for different production runs.

Neighbouring Whirlpool Range models

These model numbers sort next to this one in the catalog and are usually the same product family.

• RM778PXXB0 — 12 parts
• RM955PXKW0 — 12 parts
• RM955PXLW1 — 15 parts
• RM955PXLW2 — 14 parts
• RM955PXPW0 — 19 parts
• RM778PXT3 — 17 parts
• RM778PXT2 — 15 parts
• RM778PXT1 — 13 parts
• RM778PXT0 — 13 parts
• RM770PXBQ2 — 13 parts

Still not sure?

Use the model lookup tool to search by model or part number, or start from the symptom your appliance is showing.