Parts for M437B — Whirlpool Microwave
We found 15 parts confirmed to fit the Whirlpool Microwave M437B.
Compatibility table
| Part # | Part | Also fits | Reference price |
|---|---|---|---|
| 05200253 | Charcoal Filter | 3 models | — |
| 05200168 | Diode | 9 models | — |
| 05200186 | "fuse, 125v 1" | 14 models | — |
| 05200137 | Main Top Bulb | 14 models | — |
| 05200158 | Stirrer Motor | 14 models | — |
| 31350086 | Logic Switch | 18 models | — |
| 05200136 | Oven Bulb | 19 models | — |
| 30050024 | Screw | 27 models | — |
| 05200066 | Air Duct | 30 models | $47.40 |
| 05200150 | Bottom Hinge | 30 models | $45.29 |
| 05200176 | Cooking Tray | 30 models | $103.32 |
| 05200203 | Door Seal | 30 models | $91.06 |
| 05200143 | Foam Seal | 30 models | $24.67 |
| 05200159 | Stirrer Blade | 30 models | $103.32 |
| 05200217 | Trim | 30 models | $70.95 |
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.
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 M437B: 05200253 (Charcoal Filter), 05200168 (Diode), 05200186 ("fuse, 125v 1"), 05200158 (Stirrer Motor), 31350086 (Logic Switch), 05200066 (Air Duct), 05200143 (Foam Seal), 05200159 (Stirrer Blade).
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 M437B: 05200137 (Main Top Bulb), 05200136 (Oven Bulb).
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 M437B: 30050024 (Screw), 05200150 (Bottom Hinge), 05200176 (Cooking Tray), 05200217 (Trim).
Door and drum seals
Symptom: A door or drum seal that has lost its grip, letting water or conditioned air escape past it.
Check: Inspect the seal for tears, flattening, or gaps, and check it against your model's part number before ordering.
Parts in this group on M437B: 05200203 (Door Seal).
Before you buy
Match M437B 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 microwaves, the model and serial plate sits inside 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 Microwave models
These model numbers sort next to this one in the catalog and are usually the same product family.
Still not sure?
Use the model lookup tool to search by model or part number, or start from the symptom your appliance is showing.