Built-in dishwasher with the door open and racks pulled out
9 components covered

Field manual · Dishwasher

KitchenAid KDTM404K (KDTM404KPS) dishwasher: quick sheet

Covers: KitchenAid 24 in top-control KDTM404K* (PS = stainless with PrintShield, plus other finishes), sold approx. 2018-2022 (inferred from listing dates; retailers now mark it no longer available). The earlier KDTM404E is a close predecessor.

Cross-checkedBrands: KitchenAid9 components

KitchenAid's popular 44 dBA third-rack unit on the Whirlpool platform: stainless tub, 16 place settings, a FreeFlex third rack with its own spray jets, and ProDry heated drying with a fan. Diagnosis is the same as other Whirlpool-built units (F#E# codes, 1-2-3 diagnostic entry); the extra parts to check are the third-rack water feed and the drying fan.

Safety first

  • Turn off the breaker (or unplug) before removing the toe kick or any panel; a hard-wired unit can still be live at the junction box.
  • Close the hot-water supply valve before touching the inlet valve or supply line.
  • Let the unit cool after a cycle: the heating element, heater housing and water can be hot enough to burn.
  • Sump and filter areas often hold broken glass; wear cut-resistant gloves.
  • Never bypass the float, flood or leak switch to make a unit run; find the source of the water instead.

How it works

Wash: one wash motor supplies the lower arm, a middle arm and the third rack. KitchenAid markets 360° Max Jets on the third rack. The upper rack has to dock with the water feed at the back of the tub or the top spray is weak.

Sensing and cycles: the thermistor/OWI sensor drives the sensor-based cycles. Sani Rinse and heated options use the tub-floor element.

Drying: ProDry uses the element to heat the air and a fan to exhaust moisture. A stainless tub holds heat better than the plastic tub on Whirlpool-branded models.

Filter: manual-clean two-part filter at the back of the tub floor.

Components & tests

Unlock all 9 components, specs, service mode and teardown

Full library + AI assistant for $34.90, one time.

Get lifetime access

Official manufacturer documentation

Always confirm values against the tech sheet for the exact model.

OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Built-in dishwasher with the door open and racks pulled out by Castorly Stock, Pexels License

Diagnostic guides for this appliance

Component test · Dishwasher

How to test a dishwasher heating element

Many US dishwashers have a hidden or visible loop element under the tub. A good one reads in the tens of ohms. A leak to the tub trips the GFCI even when the resistance looks fine, so always check to ground.

5 steps ~20 mineasy
Component test · Dishwasher

How to test a dishwasher circulation (wash) pump motor

The wash motor pushes water to the spray arms. Older units use an AC induction motor; many newer ones use a brushless DC motor driven by the board. Rule out a jam and a filter clog before testing, and use the tech sheet for winding values.

6 steps ~45 minmoderate
Component test · Dishwasher

How to test a float switch (dishwasher overfill and similar)

A float rides up with water and opens or closes a small switch under the tub. It stops overfill or flags a leak. Make sure the float moves freely before blaming the switch.

6 steps ~20 mineasy

Other dishwashers manuals

Manual · Dishwasher

Fisher & Paykel DishDrawer: field service manual

Single (DS/DD24S...) and double (DD24D..., DD24DC...) DishDrawer units, US 24 in and 36 in widths, generations with model numbers ending 5, 6, 7 and later 9-series. Older classic units (DD603/DS603 era) report faults with flashing program lights; later units show F- and U-codes on a display.

10 components6 common failuresFisher & Paykel
Manual · Dishwasher

Asko dishwasher: field service manual

Asko 24 in built-in dishwashers sold in the US with F-code displays. Code meanings below are for the common F1-F7 set; newer generations may use different formats. Check the model's own code list.

7 components4 common failuresAsko
Manual · Dishwasher

Beko / Blomberg dishwasher: field service manual

Beko (e.g. DDT, DUT families) and Blomberg (e.g. DWT family) 24 in built-in dishwashers sold in the US. Beko and Blomberg share an owner group and many parts; some drain pumps are listed for both brands.

5 components2 common failuresBeko, Blomberg
KitchenAid KDTM404K (KDTM404KPS) dishwasher: quick sheet · OnCall Tech