The short answer
On a Frigidaire 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: run a finger round the lower corners of the door gasket, because on this platform the seal shrinks back from the bottom corners first.
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: Frigidaire builds this dishwasher as an Electrolux-built tall tub with a single-piece door gasket seated in a channel around the tub mouth, a filter-based sump and a compact drain pump. 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 Frigidaire drain pump is compact and ticks against debris in the impeller, and it is heard only in the short drain bursts.
- A blocked or unseated spray arm — Why this rank: Frigidaire's arms clip rather than thread on, so a partly seated arm knocks against the rack on every rotation.
- A foreign object in the sump — Why this rank: The Frigidaire sump is shallow, which puts anything hard straight into the path of the wash impeller.
- Debris in the hard-food disposer — Why this rank: A shard of glass or a fruit pit in the grinder rattles hard.
- Debris in the chopper assembly — Why this rank: The chopper grinds against a fixed plate, and anything hard trapped there produces a harsh rattle during wash only.
- Body: Ranked for a Frigidaire 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 Frigidaire drain pump is compact and ticks against debris in the impeller, and it is heard only in the short drain bursts. Second: spin each arm by hand and run water through its jets at a tap. With the first check clean, this is what the Frigidaire platform makes next most likely. Third: lift the filter and feel round the sump with the power off. Only after those three is it worth reaching for debris in the hard-food disposer: it costs more to get at, and it does not explain the first three coming back clean.
Checks you can make
- Wipe the whole gasket dry, close the door on a strip of paper at each of the four corners and pull. A corner that grips loosely while the others hold is the section that has shrunk. — Tools: paper strip, cloth — 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
- Look under the sink at the drain hose. A hose that runs straight from the machine to the disposer with no rise siphons the sink back into the tub every time it is used. — Tools: flashlight — Time: about ten 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 the sump is clear and the arms turn freely but the whine remains
Nearest pages
What this page omits
This is generalized information: it ranks causes for the Frigidaire 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: - [Frigidaire Dishwasher: Door, Latch or Seal Fault](/blog/frigidaire-dishwasher-door-seal) - [Frigidaire Dishwasher: Will Not Drain](/blog/frigidaire-dishwasher-drainage-failure)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
