Do All Dishwashers Have Filters: Complete Guide for Homeowners

Smelly dishes and film-coated glassware almost always trace back to one place: a neglected dishwasher filter. If you’ve asked do all dishwashers have filters, the short answer is that nearly every dishwasher sold in the US since 2012 has one — you just may not know where to look. Older models and some budget units use a self-cleaning “hard food disposer” instead. This guide explains which machines have manual filters, which have self-cleaning designs, how to find yours, and why cleaning it every month or two is the single biggest performance upgrade you can make.

The Two Basic Dishwasher Filter Designs

Every residential dishwasher falls into one of two camps:

• Manual-clean filter (removable): a plastic cylinder or mesh tray at the bottom of the tub that you pull out and rinse
• Self-cleaning filter (hard food disposer): a grinder that pulverizes food and flushes it down the drain

Modern Bosch, Miele, Whirlpool (higher-end), KitchenAid, LG, and Samsung dishwashers almost all use manual filters. Older GE, Maytag, and many entry-level Whirlpool and Kenmore units use the self-cleaning grinder. Both designs have filters in the technical sense; only one needs your attention.

Why the Industry Shifted to Manual Filters

Until the late 2000s, most US dishwashers used a grinder to pulverize food into the drain line. It was convenient — you never had to touch anything — but noisy and inefficient. As energy and water standards tightened, manufacturers adopted the European-style manual filter. Benefits:

• Runs 8 to 12 dBA quieter (that’s the difference between a hum and a whisper)
• Uses 2 to 4 fewer gallons of water per cycle
• Captures food before it reaches the pump, extending pump life
• Allows much finer mesh — cleaner final rinse

The trade: you have to pull and rinse the filter every month or so, or dishes come out worse, not better.

How to Find Your Dishwasher’s Filter

Open the door and remove the lower rack. At the bottom of the tub you’ll see one of these layouts:

• Round filter under the spray arm: twist counterclockwise to unlock, lift out
• Two-part filter (upper cylinder + lower flat mesh): twist and pull the cylinder first, then lift the flat mesh
• Flat mesh plate only: lift by a tab on one side
• No removable filter visible: you likely have a self-cleaning grinder

If you’re not sure, check the owner’s manual or search the model number online. Every manufacturer publishes cleaning instructions.

How to Clean a Manual Filter

Once you’ve located the filter, cleaning takes 3 to 5 minutes:

1. Pull out the lower rack and remove the filter assembly
2. Separate the upper cylinder from the lower mesh if it’s a two-part design
3. Rinse both pieces under warm running water, rubbing with your fingers to dislodge particles
4. Soak in warm soapy water for 10 minutes if there’s a greasy film
5. Scrub stubborn spots with a soft-bristle brush (an old toothbrush works)
6. Reinstall, locking the cylinder firmly — a loose filter dumps food back into the dishes

Do not use metal scouring pads or wire brushes. They shred the fine mesh and force you to buy a replacement at $30 to $80 depending on the brand.

How Often to Clean the Filter

Frequency depends on how well you pre-rinse and what you wash:

• Light use, well-rinsed dishes: every 2 to 3 months
• Daily use, typical family: every 4 to 6 weeks
• Heavy use with greasy pots and lots of food residue: every 2 to 3 weeks

Warning signs the filter needs cleaning now: dishes come out grainy, the interior smells sour, the cycle takes longer than normal, or standing water pools around the filter after a cycle.

What Happens If You Never Clean It

A clogged filter starves the spray arms of clean water. Every cycle re-circulates chunks of old food across your “clean” dishes. Expect:

• Gritty residue on glasses and plates
• Persistent sour or fishy smell
• White film on stemware and plastic (minerals no longer rinse away)
• Reduced pump life — food particles wear the impeller
• Eventually, drain errors and overflow

A pump replacement on a modern dishwasher runs $300 to $500 installed. Spending 5 minutes every 6 weeks prevents it.

Self-Cleaning Grinder Dishwashers

If your machine grinds food on its own, you don’t have a manual filter to pull. You still have maintenance to do:

• Wipe the bottom of the tub around the pump housing every month
• Run an empty hot cycle with a cup of white vinegar on the top rack quarterly
• Check the drain line for kinks every 6 months
• Listen for a grinding sound that lasts more than a few seconds — a broken glass or bone can lock the disposer

Grinder-style dishwashers run louder (55 to 65 dBA vs. 42 to 48 dBA on filtered units) because of that food-disposer mechanism.

Dishwasher Filters vs. Dishwasher Cleaners

Products like Affresh, Finish dishwasher cleaner, and citric acid tablets target mineral scale and grease film — not food debris. They do not replace cleaning the filter. Use both:

• Monthly: clean the filter by hand
• Every 1 to 3 months: run a dishwasher cleaner tablet on an empty hot cycle

Tips to Extend Filter Life

• Scrape solids into the trash before loading — skip the full pre-rinse, just remove chunks
• Don’t load dishes stacked face-down over the spray tower, which blocks water flow
• Use enough rinse aid to help dishes and filter drain cleanly
• Run a hot cycle at least once a week to keep grease from solidifying in the filter
• Never put oversized pot lids in a way that blocks the lower spray arm

When the Filter Won’t Come Clean

Over years of use, the plastic mesh of a filter can yellow and trap grease no amount of scrubbing removes. Replacement filters cost $25 to $80 direct from the manufacturer or through Amazon (search your model number + “filter”). Swapping a filter is a 2-minute job. Compare that to the performance hit of a clogged one, and the replacement is a no-brainer every 3 to 5 years.

The Short Answer Again

Nearly every dishwasher has a filter of some kind. Most new ones have a manual filter you pull and rinse. Older models or budget units use a self-cleaning grinder. Find yours, clean it on a schedule, and your dishwasher will outperform whatever the spec sheet claims.