Whirlpool Dishwasher Rack Arm (W10546503)

The Whirlpool Dishwasher Rack Arm guides the movement of the dish rack and helps it slide in and out on the track. It supports the rack, keeps it aligned, and reduces side-to-side play during loading, washing, and unloading. If the rack does not move smoothly or does not stay seated on the rails, this part may be worn or damaged.

Failure often happens from repeated wear on the rollers and pivot points, impact from overloading, or stress from forcing the rack when it is misaligned. Cracks in the plastic, a bent arm, or a worn mounting area can also cause the rack to sit unevenly and pull off the track. Heat and detergent exposure over time can make the material brittle and more likely to break.

Common signs that point to a rack arm problem include:

Rack slides roughly, binds, or stops partway

Rack tilts, sags, or sits unevenly on the rails

Rack comes off the track or pops out during normal use

Visible cracking, warping, or broken sections on the rack arm

Rollers do not track straight or wobble as the rack moves