How to Install Dishwasher Filter Retainer 4930DD3002A in a LG Dishwasher

Quick answer: Cut power to the dishwasher, slide out the lower rack and twist off the lower spray arm, lift the cylinder filter out of the sump, unscrew the old retainer, seat 4930DD3002A so its tabs line up with the filter slots, tighten the screws, refit filter and arm, and run a rinse cycle.

The filter retainer 4930DD3002A is the bracket at the bottom of an LG dishwasher tub that locks the fine filter into the sump. Without it the filter floats, lifts during the wash and lets food debris reach the circulation pump, which shows up as gritty glasses, a rattling noise or a dishwasher that stops draining. LG builds the retainer from plastic; it cracks when a dropped utensil wedges under it or when someone forces the filter in at the wrong angle, and once a tab is broken the filter will never sit tight again.

This guide covers the full-size LG models the part is listed for, including LDF7810BB01, LSDF995ST, LDF7932ST and LDS4821BB. Everything happens inside the tub, so there is no need to pull the dishwasher out from under the counter. Expect about twenty minutes, most of it cleaning the sump while you have it open. Wear gloves, because broken glass and bone fragments collect exactly where you will be working.

See part details and every compatible model: 4930DD3002A

⚠️ Safety First
  • Switch off the dishwasher breaker or unplug the unit under the sink before working in the sump; the heater and pump are right below your hands.
  • Wear gloves: the sump collects glass shards, bone splinters and sharp plastic.
  • Let the dishwasher cool if it has just finished a cycle; the tub floor and heating element stay hot for a while.
  • Do not lean on the open door; the hinges and door springs are not built to take body weight.

Tools and Parts You Need

  • Replacement filter retainer 4930DD3002A
  • Phillips screwdriver
  • Flashlight
  • Sponge and a small cup for standing water in the sump
  • Work gloves
  • Old toothbrush for cleaning the filter seat

Step-by-Step Installation

  1. Disconnect power Turn off the breaker for the dishwasher or unplug the cord under the sink. Open the door fully and confirm the control panel is dark.
  2. Remove the lower rack Pull the bottom rack all the way out and lift it off the door. Set it aside so you have a clear view of the tub floor.
  3. Take off the lower spray arm On these LG models the lower arm sits on a hub over the filter. Turn the arm retaining nut counterclockwise or lift the arm straight up, depending on your model, and set it aside.
  4. Lift out the filter Rotate the cylinder filter a quarter turn to unlock it and pull it up and out of the sump. Take the flat mesh screen out too if your model has one. Sponge out any standing water.
  5. Unscrew the old retainer Shine a light into the sump and find the screws holding the retainer to the sump housing. Back them out with the Phillips screwdriver and keep them; the new retainer usually reuses them. Lift out the broken retainer and any loose fragments.
  6. Clean the seat Scrub the filter seat and the retainer mounting surface with a toothbrush. Any grit trapped under the new bracket will keep it from sitting flat.
  7. Install 4930DD3002A Set the new retainer in place, matching its locating tabs to the slots in the sump so the filter locking lugs will engage. Drive the screws in until snug; plastic strips if you overtighten.
  8. Refit filter and spray arm Drop the mesh screen in first, then the cylinder filter, and twist it until it clicks into the retainer. Reinstall the spray arm and spin it by hand to be sure it turns freely.
  9. Test Slide the lower rack back in, restore power and run a short rinse cycle. Listen for rattling and check that the filter is still locked when the cycle finishes.

Fit Checks Before You Call the Job Done

  • The filter twists into the retainer with a firm click and cannot be lifted out without unlocking it.
  • The retainer sits flush on the sump housing with no rocking when pressed at each corner.
  • The lower spray arm spins freely by hand and does not touch the filter handle.
  • No pieces of the old retainer remain in the sump or under the filter screen.
  • Your model number, such as LDF6920WW or LSD795ST4, appears in the fitment list for this part.

Common Mistakes to Avoid

Forcing the filter in Slamming the filter down without aligning the lugs is what broke the old retainer. Align, press gently, then twist.

Overtightening the screws The retainer is plastic and the sump threads are plastic. Snug is enough; stripping them means a sump repair.

Leaving fragments behind A shard of the old bracket can jam the drain impeller. Feel around the sump with a gloved hand before installing the new part.

Skipping the power disconnect Some LG models start a drain pump when the door is closed. Work with the breaker off so nothing spins while your hand is in the sump.

Reinstalling a clogged filter A retainer will not fix poor cleaning if the filter itself is coated in grease. Wash the filter in hot soapy water before it goes back.

Troubleshooting After Installation

Filter will not lock The retainer is rotated or a tab is not in its slot. Loosen the screws, re-seat the retainer against the locating features and try again.

Rattling during wash The spray arm is rubbing on the filter handle or the filter is loose. Confirm the filter is twisted fully and the arm is seated on its hub.

Standing water after the cycle Debris that fell during the repair may be in the drain path. Remove the filter again and clear the sump and drain inlet.

Poor cleaning continues Check that the mesh screen went in before the cylinder filter and that the lower spray arm nozzles are not blocked.

Care Tips After the Repair

  • Pull and rinse the cylinder filter every two to four weeks; a clean filter puts far less stress on the retainer.
  • Scrape plates but do not pre-rinse to bare porcelain; detergent needs some soil to work, yet large bones and pits belong in the trash.
  • Check the sump for broken glass after any load where a glass broke.
  • Run a dishwasher cleaner or a hot cycle with citric acid every few months to keep grease off the sump surfaces.

Compatible Models (Sample)

This part is listed for 52 LG models in our fitment data. Always confirm your exact model number on the appliance's rating plate.

Repair Difficulty and Time

Difficulty: Easy. Typical time: 15 to 30 minutes.

Frequently Asked Questions

Does 4930DD3002A come with screws?

It is normally the bracket only. Keep the screws from the old retainer; if one is missing or corroded, a matching stainless screw from your parts supplier is the safe substitute.

Can I run the dishwasher without the retainer while I wait for the part?

It is not recommended. Without the retainer the filter can lift and let debris into the pump, which turns a cheap fix into an expensive one.

Is the retainer the same for LDF7932BB and LDF7932WW?

Yes. Those are color variants of the same platform and both appear in the fitment list for this retainer.

Do I need to remove the dishwasher from the cabinet?

No. The retainer is reached entirely from inside the tub after the lower rack, spray arm and filter are out.

Final Checklist

  • Breaker off or dishwasher unplugged
  • Lower rack and spray arm removed
  • Cylinder filter and mesh screen out
  • Old retainer unscrewed and all fragments removed
  • Sump and filter seat scrubbed clean
  • 4930DD3002A aligned to its slots and screws snug
  • Filter locked with a click, spray arm turning freely
  • Rinse cycle run with no rattle and full drain

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