Dishwasher Not Cleaning the Bottom Rack? Lower Spray Arm Assembly W11814179 – Fix Poor Water Coverage Fast

Dishes coming out dirty, greasy, or with food residue on the bottom rack are a clear sign the lower spray arm assembly has failed or is blocked beyond cleaning. In most Whirlpool, KitchenAid, JennAir, and Maytag dishwashers, the lower spray arm is the primary water distribution component for the bottom rack. When it cracks, warps, or loses nozzle pressure, water coverage collapses — leaving dishes wet, spotted, and uncleaned even after a full cycle. ⚡ Common failure point in Whirlpool-platform dishwashers across KitchenAid, JennAir, Maytag, and Kenmore lineups. Part W11814179 is the genuine OEM lower spray arm assembly (Style 1) that restores full bottom-rack water coverage and eliminates cleaning failures caused by a degraded or broken spray arm.

❓ Is This the Right Part?

This is the correct fix if ALL of the following are true:

• ✔ Dishwasher powers on and runs a full cycle normally
• ✔ Upper rack and top spray arm are cleaning correctly
• ✔ Water supply and inlet valve are confirmed functioning
• ✔ ONLY problem is poor cleaning, standing water, or residue on the bottom rack

Not sure? Send us your model number — we'll confirm before you order.

🔧 Common Symptoms

• Food residue or grease left on bottom-rack dishes after a full cycle
• Spray arm visibly cracked, warped, or not spinning freely
• Unusual rattling or grinding noise during the wash cycle
• Standing water pooling under the bottom rack after the cycle ends

✔ If these symptoms match, this is the most likely failed component in the system.

✔ In most cases, replacing this lower spray arm assembly restores full bottom-rack cleaning performance immediately.

📦 Part Details

• Part Number: W11814179
• Type: Genuine OEM Dishwasher Lower Spray Arm Assembly, Style 1
• Replaces: W11048456, W11550888, W11789941
• Supersession Chain: W11048456 → W11550888 → W11814179; W11789941 → W11814179
• Brands: Whirlpool, KitchenAid, JennAir, Maytag, Kenmore

⚙️ Installation

Skill Level: EASY — 10–20 Minutes. Disconnect power before servicing. Remove the bottom dish rack, then unscrew or unclip the existing lower spray arm from the wash pump hub at the base of the tub. Snap or thread the new W11814179 assembly into place, confirm it spins freely, reinstall the rack, and run a short test cycle to verify coverage.

✓ Compatible Models

Confirmed compatible with 66514865N120, 66514869N120, 66514875N120, BLB14GRANA1, BLB14GRANA2, JDPSG244LS1, JDPSG244LS2, JDPSS244LL2, JDPSS244LM2, JDPSS244PL0, JDPSS244PM0, JDPSS245LX1, JDPSS246LL0, JDPSS246LL1, JDPSS246LM0, JDPSS246LM1, KDFE104KBL0, KDFE104KBL1, KDFE104KBL2, KDFE104KPS0, KDFE104KPS1, KDFE104KPS2, KDFE104KWH0, KDFE104KWH1, KDFE104KWH2, KDFE105PPS0, KDFE204KBL0, KDFE204KBL1, KDFE204KBS0, KDFE204KBS1, KDFE204KPS0, KDFE204KPS1, KDFE204KWH0, KDFE204KWH1, KDFM404KBS0, KDFM404KPS0, KDFM404KPS2, KDPM604KBS0, KDPM604KBS1, KDPM604KPS0, KDPM604KPS1, KDPM704KPS1, KDPM804KBS0, KDPM804KBS1, KDPM804KPS1, KDTE104KPS0, KDTE104KPS1, KDTE104KPS2, KDTE204KBL0, KDTE204KBL2, KDTE204KBS0, KDTE204KBS1, KDTE204KBS2, KDTE204KPS0, KDTE204KPS1, KDTE204KPS2, KDTE204KWH0, KDTE204KWH2, KDTE304LPA1, KDTM404KBS0, KDTM404KBS1, KDTM404KPS0, KDTM404KPS1 plus additional Whirlpool-platform models. Contact us to verify your model number before ordering.

💡 Pro Tip

✓ Model-Specific Repair Pages