The short answer
On a Samsung dishwasher, a noise that was not there before usually comes down to a jammed or failing drain pump rather than anything deeper in the machine: a drain pump stalled by debris leaves standing water and stops the cycle from advancing. That keeps it an owner check first, not a service call. Start here: look for water in the base pan, because a Samsung latches its leak state and will keep the drain pump running until the pan is dry.
What you are seeing
- A hard rattle that only appears during the wash phase
- A steady whine that rises as the cycle gets going
- A knocking that stops the moment the pump stops
- Not this fault: A hum with no water movement at all, which is a stalled pump rather than a noise fault
- Not this fault: Water on the floor with the noise, which is a leak and takes priority
- Body: Samsung builds this dishwasher as a stainless tub with the leak sensor in the sump and a float in the base pan, and a door sealed by side gaskets plus a separate sump-lip gasket rather than one continuous loop. That architecture decides which of these you see first.
- Also check note: If these fit better, the fault is a different one.
Likely causes, in order
- A jammed or failing drain pump — Why this rank: The Samsung wash pump is a sump-mounted assembly whose bearing announces itself as a rising whine through the cycle.
- A failing wash-motor bearing — Why this rank: A dry bearing whines steadily through the wash phase and rises as the motor loads up.
- A blocked or unseated spray arm — Why this rank: Samsung's lower arm clips rather than threads on, and a partially seated arm scrapes the filter cage.
- A foreign object in the sump — Why this rank: The Samsung sump is deep and holds glass chips right against the impeller.
- Debris in the hard-food disposer — Why this rank: A Samsung has no hard-food disposer, so a grinding noise here is the wash impeller against debris rather than a grinder.
- Body: Ranked for a Samsung dishwasher specifically.
What to check, in order
- Body: The order follows the ranking, and the ranking follows the platform. First: remove the filter and check the pump impeller for wire, glass or a label. It goes first because the Samsung wash pump is a sump-mounted assembly whose bearing announces itself as a rising whine through the cycle. Second: open the door mid-cycle and note whether the noise stops with the pump. With the first check clean, this is what the Samsung platform makes next most likely. Third: spin each arm by hand and run water through its jets at a tap. Only after those three is it worth reaching for a foreign object in the sump: it costs more to get at, and it does not explain the first three coming back clean.
Checks you can make
- Tip the machine gently back onto its rear feet and look into the base pan with a flashlight. Standing water there means the float has been tripped and explains a machine that will not start a cycle. — Tools: flashlight, towel — Time: about ten minutes
- With the power off, lift out the filter and feel carefully round the whole sump with a gloved hand for glass, bone or fruit stones, then look with a flashlight before refitting anything. — Tools: gloves, flashlight — Time: about fifteen minutes
- Wipe the sump lip and the lower door gasket dry, run a short cycle and stop it at the wash stage. A wet lower corner with dry sides isolates the fault to one gasket section. — Tools: paper towel — Time: about twenty minutes
- Lift each spray arm off its mount, run water through it at the tap and check that every jet passes water. Refit each arm and spin it by hand to confirm it turns freely through a full rotation. — Tools: none — Time: about fifteen minutes
- Body: Stop at the first step that would need a meter on live terminals or a sealed assembly opened.
Before you open anything
Safety
Switch the machine off at its breaker, or unplug it, before removing any panel. Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Work with the floor dry and stand on something dry. Water on the floor is part of the electrical hazard, not separate from it.
When to call
The line is not difficulty, it is what the next step costs and risks. Call when: the noise is a metallic grinding that gets worse over a single cycle
Nearest pages
What this page omits
This is generalized information: it ranks causes for the Samsung dishwasher range as one platform, not for a single model. Where a page exists for your specific model it is the more specific one and takes precedence over this. The narrower pages below cover the other presentations of this symptom.
Entries: - [Samsung Dishwasher: Door, Latch or Seal Fault](/blog/samsung-dishwasher-door-seal) - [Samsung Dishwasher: Controls, Display or Error Code](/blog/samsung-dishwasher-control-fault) - [Samsung Dishwasher: Electrical, Fire or Gas Hazard](/blog/samsung-dishwasher-electrical-safety)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
