JennAir Dishwasher Not Draining — JDTSS246GP & JDTSS246GX Repair Guide

Common Symptoms

• Standing water (1–3 inches) remains in the dishwasher tub after the cycle ends
• Dishwasher completes wash cycle but skips or shortens the drain cycle
• Error code E2 or F2 displayed on JDTSS246GP or JDTSS246GX control panel
• Gurgling or humming noise at the end of the cycle with no drain
• Water backing up into the sink drain when dishwasher attempts to drain
• Dishes sitting in murky water at cycle end
• Dishwasher drains slowly — takes much longer than normal to clear

Most Likely Causes

1. 1

   Clogged Filter Assembly (Most Common — Free Fix)

   JennAir JDTSS246GP and JDTSS246GX dishwashers use a manual-clean two-piece filter (cylindrical mesh + flat coarse filter) at the bottom of the tub. When this filter is clogged with food debris, it restricts the drain pump inlet and prevents proper draining. JennAir recommends monthly cleaning; many users have never cleaned it. This is the most frequent cause of a JennAir dishwasher not draining.

2. 2

   Blocked or Kinked Drain Hose

   The corrugated drain hose runs from the drain pump outlet under the tub to either the sink drain air gap or directly to the garbage disposal inlet. Kinks in the hose (common when the dishwasher is pushed too far back during installation), grease buildup inside the hose, or a missing high loop can all prevent full drainage. If the dishwasher drains slowly or incompletely, inspect the full drain hose run.

3. 3

   Garbage Disposal Knockout Plug Not Removed

   On new garbage disposal installations where the dishwasher drain hose was connected for the first time, the factory knockout plug inside the disposal's dishwasher inlet port must be removed. If it was not, the dishwasher cannot drain at all. This is a common installation error. Insert a screwdriver into the disposal's dishwasher port and knock the plug inward, then fish it out.

4. 4

   Failed Drain Pump Motor

   The drain pump (W11084656 on JDTSS246GP / JDTSS246GX, also supersedes W10872845) is an electric pump that actively evacuates water through the drain hose. When the pump motor fails, you may hear humming or silence at the drain phase rather than the rushing sound of draining. Test the pump motor windings with a multimeter (should read 5–15Ω; OL = failed). The pump is located under the wash tub and requires partial disassembly to access.

5. 5

   Blocked Air Gap

   If your installation uses a sink air gap (the chrome cylinder next to the faucet), it can become clogged with debris over time. A blocked air gap causes the dishwasher to drain water that immediately backs up into the tub. Remove the air gap cap and clean the internal passages with a small brush or pipe cleaner.

6. 6

   Check Ball or Drain Flapper Stuck Closed

   JennAir dishwashers on the Whirlpool platform use a small check ball or flapper valve in the sump area to prevent back-flow of water into the tub between cycles. If this valve is stuck closed (gummed up with grease or debris), it will block the drain pump from pushing water out. Cleaning the sump area and check valve typically resolves this.

Quick DIY Checks

1. 1Remove and clean the filter assembly: Open the dishwasher and remove the lower rack. Twist the cylindrical mesh filter counterclockwise (about a quarter turn) and lift it out, then lift out the flat coarse filter beneath it. Rinse both under warm running water, scrubbing with a soft brush and dish soap to remove all grease and debris. Inspect the sump area beneath the filter for any large food chunks or debris — remove by hand or with a wet/dry vacuum. Reinstall the filters and run a rinse cycle to test drainage.
2. 2Check the garbage disposal connection: If the dishwasher drain hose is connected to a garbage disposal, run the disposal for 30 seconds before running the dishwasher. A full disposal can back up the dishwasher drain. If the disposal was recently installed new, check that the knockout plug was removed from the dishwasher inlet port — insert a flashlight and look inside the port. If the plug is still there, insert a screwdriver and knock it free, remove the plug fragment, and test drainage.
3. 3Inspect and clear the drain hose: Pull the dishwasher out from under the counter (disconnect power first). Trace the corrugated drain hose from the pump outlet (bottom front of the dishwasher) to where it connects to the sink or disposal. Check for kinks — straighten any bends and secure the hose with a clamp or bracket so it cannot kink again. Disconnect the hose from the drain or disposal, place the end in a bucket, and manually power a drain cycle to check if water flows. If the hose is clogged, flush with hot water and use a bottle brush to clear the blockage.

Repair vs Replace

Recommended Tools & Parts

• JennAir / Whirlpool Drain Pump — W11084656

  Replacement drain pump motor for JennAir JDTSS246GP, JDTSS246GX, and many KitchenAid/Whirlpool-platform dishwashers. Also supersedes W10872845 and W10482502. Required when the pump tests OL on a multimeter or when humming is heard at the drain phase with no water movement. Installs from inside the tub sump area.

  $35–$60

  Buy on Amazon →

• JennAir Dishwasher Filter Assembly — W10872845

  Replacement two-piece filter assembly (cylindrical mesh + flat coarse filter) for JennAir dishwashers on the Whirlpool/KitchenAid platform. Replace if the filter mesh is torn, cracked, or cannot be cleaned. Monthly cleaning is required — a clogged filter is the #1 cause of JennAir dishwasher not draining.

  $15–$30

  Buy on Amazon →

• Dishwasher Drain Hose — Universal / OEM

  Replacement corrugated drain hose for JennAir dishwashers. Required if the existing hose is cracked, permanently kinked, or has developed a leak. Available in 6-foot and 8-foot lengths to accommodate varying installation depths.

  $10–$25

  Buy on Amazon →

• Digital Multimeter

  Used to test drain pump motor winding resistance (Ω mode) and verify electrical continuity. Essential for confirming pump failure before ordering parts.

  $15–$35

  Buy on Amazon →

Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.

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