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Upper rack dishes come out dirty or with food residue because the broken mount disrupts water flow through the spray arm, leaving the top rack under-washed.
The upper spray arm becomes loose, wobbles, or detaches during operation when the mount is cracked or broken, preventing proper rotation and water distribution.
A damaged or cracked mount fails to seal the connection between the spray arm and the water supply tube, causing noticeable water leakage during the wash cycle.
A rattling or knocking sound from the upper rack area during operation is a common sign that the spray arm mount has broken and the arm is hitting the rack or tub walls.
💡 Pro Tip: How to Know Your Upper Spray Arm Mount Has Failed
Your part is likely the culprit if you notice any of the following:
⚠️ Upper-rack dishes coming out dirty or with food residue while lower-rack dishes are clean
⚠️ Spray arm rattling, wobbling, or falling off inside the dishwasher during a cycle
⚠️ Visible cracks, breakage, or deformation on the plastic mount body
⚠️ Water leaking or dripping from the upper rack area during the wash cycle
🔍 Diagnostic tip: Pull the upper rack out fully and flip it upside down. Inspect the mount where the spray arm attaches — any crack, play in the fit, or visible fracture confirms replacement is needed. Also check the spray arm itself for hairline cracks that could cause the same symptoms (part W10594035 or equivalent).
📦 What's in the Box
✅ 1× Upper Spray Arm Mount / Center Wash Arm Support (replaces WP8539324) — redesigned clip-on version, no additional hardware required
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Disclaimer: Compatibility information, part numbers, and model fitment data on this page are sourced from manufacturer databases and third-party references. While we strive for accuracy, please verify your appliance model number before ordering. Heima is not responsible for errors or omissions in compatibility listings.
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