Parts for DU8770XB1 — Whirlpool Dishwasher

We found 34 parts confirmed to fit the Whirlpool Dishwasher DU8770XB1.

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.

Filtration and spray system

Symptom: Dishes come out with food residue, spots, or a cloudy film, or you notice leftover debris in the tub bottom after a cycle.

Check: Remove and rinse the filter assembly under the tub, and check that the spray arm spins freely and its jets aren't clogged -- these are the first things to check before assuming a pump has failed.

Parts in this group on DU8770XB1: WP3367910 (Dishwasher Spray Arm Cap, Lower), WP3367197 (Dishwasher Sump Mounting Support), 675791 (Dishwasher Spray Arm), WP3376848 (Dishwasher Spray Arm).

Heat control (thermostats, fuses, heating element)

Symptom: Dishes don't dry at the end of the cycle, or a heated-dry setting doesn't seem to do anything.

Check: With the dishwasher unplugged, check continuity across the heating element or thermostat with a multimeter -- no continuity means it has failed.

Parts in this group on DU8770XB1: 3373359 (Dishwasher Thermostat), 3369777 (Thermostat), 717273 (Dishwasher Heating Element Rubber Washer).

Dishrack hardware (rollers, wheels and tines)

Symptom: A dish rack that binds, drags, or comes off its rail track when you pull it in or out, or a rack with a cracked, loose, or missing wheel or tine.

Check: Pull the rack fully out and check each wheel or roller for a crack or a missing axle pin, and check that tines aren't snapped off or pushed out of alignment along the row.

Parts in this group on DU8770XB1: WP3369979 (Dishwasher Dishrack Adjuster Plate), WP3376961 (Dishwasher Lower Dishrack Wheel), 675679 (Tine Tips).

Water inlet and drainage

Symptom: The dishwasher won't fill, or dishes come out with standing water still in the tub bottom after the cycle ends.

Check: Check the inlet valve's screen filter for sediment, and check the drain pump and drain hose for a clog or a jammed object -- a piece of broken glass or a bottle cap is a common culprit.

Parts in this group on DU8770XB1: 3371748 (Dishwasher Drain Hose Cap), 3374621 (Water Inlet Valve), WP3374077 (Dishwasher Drain Hose w/Connector Ends).

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 DU8770XB1: WP302710 (Inlet Base Seal), 303510 (Impeller), 3369052 (Deflector), 356138 (Hose Clamp), WP8528862 (Dishwasher Water Deflector), 675238 (Drain Check Valve with O-Ring), 301958 (Clamp), 72032 (Touch-up Paint - Black), 72017 (Touch-Up Paint - White).

Controls, timers and wiring

Symptom: A cycle that stops partway through, an error code or blinking light, 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 DU8770XB1: WP3378124 (Dishwasher Timer Cam).

Door and drum seals

Symptom: Water leaking out from around the door during or after a cycle.

Check: Check the door gasket for tears, flattening, or a section pulled loose from its channel, and confirm it seats evenly all the way around when the door is closed.

Parts in this group on DU8770XB1: 3368994 (Gasket), 717000 (Dishwasher Circulation Pump Gasket).

Door, lid switches and latches

Symptom: The dishwasher won't start, or stops mid-cycle, unless the door is fully latched shut.

Check: Listen for an audible click when the door latches. No click, or a visibly worn or broken latch or strike, points to this part.

Parts in this group on DU8770XB1: 3368953 (Door Latch), 4318273 (Dishwasher Door Switch), WP3368955 (Dishwasher Door Switch Plunger).

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 DU8770XB1: 4387043 (Detergent Dispenser Cover Kit), WP3369769 (Dishwasher Door Panel Insert), 4318050 (Door Spring & Clip Kit), WPW10348409 (Dishwasher Screw), 343641 (Screw).

Drive system (belts, pulleys, motors)

Symptom: A dish rack, spray arm, or wash-motor component isn't turning or sliding the way it should.

Check: Check that the part in question turns or slides freely by hand, and look for a cracked, worn, or seized point where it should pivot or roll.

Parts in this group on DU8770XB1: 8193646 (Lower Detergent Dispenser Actuator Assembly).

Before you buy

Match DU8770XB1 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 dishwashers, the model and serial plate sits on the edge of the door or the tub rim. 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 Dishwasher models

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

• DU8770XX0 — 18 parts
• DU8770XY0 — 24 parts
• DU8770XY1 — 19 parts
• DU8770XY2 — 102 parts
• DU8900XB0 — 24 parts
• DU8770XB0 — 40 parts
• DU8750XY1 — 31 parts
• DU8750XY0 — 21 parts
• DU8750XT3 — 16 parts
• DU8750XT2 — 18 parts

Other models with this exact parts list

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

• 6651664990 — 20 parts
• 6651664991 — 25 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.