Samsung DMT400RHB/XAA dishwasher Parts

To reset an error on your Samsung DMT400RHB dishwasher, we recommend starting with a power reset (turn the breaker off for 5 minutes, then back on). If the code returns, match the code to the problem and correct the cause before clearing it again using the steps in the DMT400RHB owner's manual.

Quick reset steps (most Samsung DMT models)

• Press Start/Reset (or Cancel/Drain) and hold for 3 to 5 seconds to stop the cycle.
• Wait for the dishwasher to drain (if it begins a drain routine).
• Turn the dishwasher off, then back on.
• If the code stays on, do a breaker reset: OFF for 5 minutes, then ON.
• Run a short cycle to confirm the error is cleared.

If the error comes back: fix the cause first

Many Samsung dishwasher error codes are “protective”; the control will show the code again until the underlying issue is corrected.

Common causes to check:

• Water supply issue: confirm the shutoff valve is fully open and the inlet screen is not clogged.
• Drain issue: check the sink/disposer connection and make sure the drain hose is not kinked.
• Leak detected: inspect for water in the base pan and look for active dripping.
• Door not latched: close the door firmly; check for rack interference.
• Over-sudsing: use only dishwasher detergent; remove excess suds by running a rinse/drain.

Parts that commonly relate to recurring error codes

If troubleshooting points to a failed component, these model-matched parts are common suspects.

Symptom you see	Often related part	What it affects
Not filling or fill errors	Dishwasher water inlet valve DD62-00084A	Water entering the tub
Not draining or drain errors	Dishwasher drain hose DD67-00059A	Water leaving the tub
Leak code or water in base	Dishwasher leak detector sensor DD94-01062A	Leak detection and shutdown

Why it matters

Resetting clears the control temporarily, but the dishwasher uses error codes to prevent flooding, overheating, and poor washing. Fixing the root cause first helps prevent repeat shutdowns and protects the pump, valve, and wiring.

Related help: Samsung dmt dishwasher error codes

Last updated: February 2026

No. For the Samsung DMT400RHB dishwasher, 46 dBA is generally considered quiet in a typical kitchen; you will usually hear a soft wash or spray sound, but it should not dominate normal conversation.

How 46 dBA compares

Dishwasher noise is commonly grouped into rough ranges:

• 38 to 44 dBA: very quiet (often hard to notice)
• 45 to 49 dBA: quiet (noticeable but not distracting)
• 50 dBA and up: average to louder (more noticeable in open kitchens)

Noise level (dBA)	What it usually sounds like	Good fit for
38 to 44	faint water movement	open-concept homes, night runs
45 to 49	soft spray and swish	most kitchens
50+	clearly audible wash noise	closed kitchens, daytime use

What can make a “quiet” dishwasher seem louder

Even at 46 dBA, a few conditions can increase perceived noise:

• The unit is not level, so the tub or pump vibrates against the cabinet
• Dishes or utensils are touching the spray arms
• A loose toe panel or insulation lets more sound out
• Hard items (stainless pots, sheet pans) reflect spray noise
• A worn rack roller can rattle as racks slide

Quick ways to reduce noise

We recommend these practical checks first:

• Confirm the dishwasher is secured and level (front to back and side to side)
• Re-load so nothing blocks or hits the spray arms
• Make sure the toe panel and insulation are installed snugly
• Inspect rack wheels and replace worn rollers if the rack chatters (for example, dishwasher dishrack roller, lower DD66-00023A)
• Follow the loading and operating guidance in the DMT400RHB owner’s manual

Why it matters

A few decibels can be a big real-world difference. Moving from 50 dBA down to 46 dBA typically feels noticeably calmer, especially in open kitchens or when running cycles overnight.

Last updated: February 2026

The most common problem we see with Samsung dishwashers like model DMT400RHB is drainage trouble (water left in the tub), usually caused by a clogged filter area, a restricted drain hose, or a failing drain pump. Leaks and “won’t start” issues are also frequent.

Most common issues (and what to check first)

• Not draining: clean the filter area and check for food debris in the sump.
• Drain hose restriction: look for kinks, clogs, or an improper high loop; replace the dishwasher drain hose DD67-00059A if it is split or permanently kinked.
• Drain pump problem: if the pump hums but won’t move water, the dishwasher drain pump DD31-00005A is a common fix.
• Leaking: check the base for water and inspect door sealing surfaces; a triggered leak sensor can stop operation.
• Not filling: verify the water supply valve is open; a failed dishwasher water inlet valve DD62-00084A can prevent filling.

Quick symptom-to-likely-cause guide

Symptom	Most likely cause	Best first step
Water left in bottom	Clogged filter/sump or restricted drain path	Clean filter area; inspect hose routing
Stops mid-cycle, beeps	Leak detected in base	Check for water under unit; dry base and find source
Poor cleaning	Spray obstruction, low water fill, dirty filter	Clear spray paths; confirm proper fill
Won’t start	Door not latching, control lock, leak condition	Confirm door closes firmly; reset power

Why it matters

Drainage and leak-related problems can trigger safety shutoffs, leave dirty water in the tub, and cause odor or repeat cycle failures. Catching a clog early often prevents replacing higher-cost parts like pumps or sensors.

Helpful model-specific resources

• Use the DMT400RHB owner’s manual for cycle behavior, cleaning guidance, and basic troubleshooting.
• If you’re seeing a code, match it using Samsung dmt dishwasher error codes before replacing parts.

Last updated: February 2026

A Samsung dishwasher typically lasts 8 to 12 years with normal household use. For the Samsung DMT400RHB, consistent cleaning, correct detergent use, and fixing small leaks or drain issues early are what most often determine whether you land closer to 8 years or closer to 12.

What affects lifespan the most

• Filter and sump cleanliness (food soil left behind makes the pump work harder)
• Hard water scale (can restrict spray arms and reduce heating efficiency)
• Drain performance (slow draining strains the drain pump)
• Door sealing and leak protection (small leaks can trigger safety shutoffs)
• Loading habits (blocked spray arms reduce cleaning and increase rewash cycles)

Typical lifespan by use pattern

Use pattern	What we usually see	Practical expectation
Light (2 to 3 loads/week)	Less wear on pump and racks	Often closer to 10 to 12 years
Average (4 to 7 loads/week)	Normal wear	Usually 8 to 12 years
Heavy (multiple loads/day)	Faster wear on motor, seals, racks	Often closer to 6 to 9 years

Maintenance that helps you reach the high end

• Clean the filter regularly (see the DMT400RHB owner’s manual for the exact steps for your model).
• Check for standing water and clear clogs early; a restricted drain path can shorten pump life.
• Run a monthly cleaning cycle (dishwasher cleaner or a manufacturer-approved method).
• Inspect for leaks at the base and under the door; address them before they become recurring.
• Keep spray arms spinning freely and avoid tall items that block rotation.

When a part replacement can extend life

If the dishwasher is otherwise in good shape, replacing a worn or failed component is often the difference between replacing the unit and getting several more years.

Symptom	Common area to check	Example part for DMT400RHB
Won’t drain or drains slowly	Drain path, drain pump	Dishwasher drain pump DD31-00005A
Poor fill or no fill	Water supply, inlet valve	Dishwasher water inlet valve DD62-00084A
Leak detected or shuts off	Leak detection system	Dishwasher leak detector sensor DD94-01062A

Why it matters

Knowing the typical 8 to 12 year lifespan helps you decide whether to invest in maintenance and parts (like a drain pump or inlet valve) versus planning for replacement, especially if you are seeing repeated error codes or leak-related shutdowns.

Last updated: February 2026