Parts for KEMC378KWH03 — KitchenAid Microwave

We found 41 parts confirmed to fit the KitchenAid Microwave KEMC378KWH03.

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.

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 KEMC378KWH03: WP8302669 (Wall Oven Membrane Switch (Black)), 4452003 (Blower), WP8304106 (Wall Oven Vent), 4375278 (Fan Motor), WP8183788 (Microwave Turntable Drive Coupler), 4375348 (Oven Baseless Lamp), 4375346 (Microwave Door Interlock Switch), W11607085 (THRMST-FIX), W11361286 (Blower Motor), W10892387 (Charcoal Filter), 4375321 (Fuse (Black)), 4451175 (Bake Element), WPW10016550 (Range Blower Motor Assembly), 423107022541 (Reflector), 5304516871 (Frigidaire Laundry Center Dryer Lint Screen), W10877562 (Door Glass), 4455636 (Wall Oven Temperature Sensor), 350930 (Spray Paint - 12 oz. - White), 72017 (Touch-Up Paint - White).

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 KEMC378KWH03: WP4452398 (Microwave Torsion Spring Right Side), WP4452395 (Torsion Spring - Stainless Steel - Left Side), 4375412 (Mounting Bracket), 4375413 (Mounting Bracket), 4452395 (Microwave Door Torsion Spring), 4452220 (Convection Rack - Short), WP9760575 (Door Hinge), WP9760576 (Door Hinge), 4448715 (Oven Rack), W11373838 (Microwave Turntable Tray), 5304505353 (Dryer Lint Screen Housing), WP4450038 (Range Control Panel Vent Screw), W11684512 (SCREW), 4450800 (SCREW,8-32 X.375 MTR SC), 814381 (Hinge Pin Kit).

Controls, timers and wiring

Symptom: A cycle that doesn't advance, an unresponsive display, or the unit not starting at all.

Check: Look for burn marks or a burnt smell near the board or terminals, and check whether buttons and knobs respond -- a unit that powers on but won't cycle often traces back to this group.

Parts in this group on KEMC378KWH03: 4375436 (Capacitor), W10888661 (Electric Control Board).

Heat control (thermostats, fuses, heating element)

Symptom: The appliance runs but heats or cools inconsistently, or shuts off partway through a cycle.

Check: With the appliance unplugged, check continuity across the part with a multimeter -- no continuity means it has failed.

Parts in this group on KEMC378KWH03: 4375279 (Wall Oven Microwave Safety Thermostat).

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 KEMC378KWH03: WPW10440740 (Microwave Halogen Bulb), WP4452164 (Oven Halogen Bulb), WP4448972 (Oven Halogen Light Assembly).

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 KEMC378KWH03: WP4455381 (Range Door Gasket).

Before you buy

Match KEMC378KWH03 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 KitchenAid Microwave models

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

• KEMC378KWH04 — 51 parts
• KEMI301GBL0 — 41 parts
• KEMI301GWH0 — 38 parts
• KEMS306XBL2 — 12 parts
• KEMS306XBL3 — 15 parts
• KEMC378KWH02 — 47 parts
• KEMC378KWH01 — 52 parts
• KEMC378KWH0 — 51 parts
• KEMC378KSS04 — 53 parts
• KEMC378KSS03 — 51 parts

Other models with this exact parts list

Each model below is confirmed to share the identical compatible-parts list with this one.

• KEMC308KBT03 — 47 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.