LG Dishwasher Filter Replacement — The Simplest Maintenance You Are Probably Skipping

LG dishwasher filters are the single easiest part to maintain on the entire machine, and also the most neglected. Unlike Bosch or Samsung filters that require a quarter-turn twist to remove, LG uses a pull-up design — you literally grab the handle on the center floor of the tub and lift straight up. No twisting, no tools, no wrestling. The filter comes out in one piece for rinsing under the tap.

Despite this simplicity, a clogged or damaged filter is responsible for a cascade of downstream problems: poor cleaning, OE drain errors, foul odors, and even drain pump failure when debris bypasses a torn mesh screen.

LG's Two-Part Filter System

LG dishwashers use a two-component filter assembly. The outer cylindrical mesh filter catches large food particles — bones, pasta, vegetable stems. The inner fine-mesh filter sits inside the cylinder and catches smaller particles — grease, coffee grounds, rice grains. Both components lift out together as one assembly.

When the outer mesh tears (common after 3-5 years of use, especially if you use sharp utensils that contact the filter), large debris passes through to the sump and can jam the drain pump impeller. This is why a $15 filter replacement can prevent a $120 pump replacement.

When to Replace vs When to Clean

Clean weekly (or after every heavy load): Pull the filter up, rinse under hot running water, use a soft brush to clear the mesh. This takes 30 seconds.

Replace when:

• The mesh screen has visible tears, holes, or stretched areas
• The plastic frame is cracked or warped
• The filter does not seat flush in the tub floor after cleaning (warped base)
• Food particles appear on clean dishes despite a freshly cleaned filter
• You cannot get the odor out even after soaking in vinegar

Part Numbers and Pricing

This is one of the cheapest parts on the entire dishwasher. Aftermarket filters work fine for this application — the filter is just a passive mesh screen with no electrical or precision mechanical requirements.

Tools Required

None. Zero tools needed. Pull up to remove, push down to install. If the filter is stuck from mineral buildup, a gentle twist while pulling breaks the scale bond.

Replacement Procedure

No need to turn off power or water. This is maintenance, not a repair.

1. Open the dishwasher door fully and remove the lower rack
2. Locate the cylindrical filter assembly in the center of the tub floor
3. Grasp the handle and pull straight up — it lifts out without twisting
4. If replacing, discard the old filter. If cleaning, rinse under hot water and scrub gently with a soft brush
5. Place the new or cleaned filter back into the recess and push down until it seats flush with the tub floor
6. Replace the lower rack

The entire process takes under 2 minutes including rack removal.

Hard Water and Filter Maintenance

In areas with hard water (common in the Sacramento and Bay Area well water zones), mineral scale builds up on the filter mesh and reduces water flow through the screen. Monthly soaking in white vinegar (submerge the filter in a bowl for 15-20 minutes) dissolves the scale. If you see white crusty deposits on the filter mesh, that is calcium — vinegar handles it easily.

Impact on Cleaning Performance

A clogged filter does not just cause drain problems. During the wash cycle, water recirculates through the filter — dirty water gets pumped back onto dishes if the filter is packed with food debris. The classic symptom is gritty or filmy dishes after a full cycle. Users often blame the detergent or the wash motor when the actual problem is a filter that has not been cleaned in months.

Preventing Drain Pump Damage

The filter is the first line of defense for the drain pump. When the mesh screen tears, food particles — especially small hard items like fruit pits, broken glass fragments, and bone chips — reach the drain pump impeller and either jam it or wear the blades. Replacing a torn filter immediately prevents a far more expensive pump repair.

Inspect the mesh visually every time you clean the filter. Hold it up to a light source — any pinholes or stretched areas mean replacement time. A new filter is $15-$40. A new drain pump is $40-$120 plus labor.

Frequently Asked Questions

How often should I clean my LG dishwasher filter?

Weekly if you run the dishwasher daily without pre-rinsing dishes. After every heavy load (pots, pans, baked-on food). Monthly at minimum even with light use. LG's pull-up design makes this a 30-second task.

Can I run the LG dishwasher without the filter installed?

Technically the machine will run, but do not do this. Without the filter, food debris goes directly to the drain pump and can jam or destroy the impeller. Always run with the filter installed.

My LG dishwasher filter is discolored. Does it need replacement?

Discoloration alone (yellowing, staining from tomato sauce) does not affect function. Replace based on physical damage — tears, holes, warping, or an inability to seat flush. Aesthetic discoloration is cosmetic only.

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