If your dishwasher's upper spray arm fell off, fixing it is usually a quick, straightforward DIY task that rarely requires professional tools. First, inspect the mounting hub, plastic locking nut, or retaining clip located at the center-rear or bottom of the upper rack where the spray arm snaps into the water supply feed. Second, check for mineral scale buildup or a broken plastic retaining clip; if the clip is snapped, order an exact OEM replacement part. Third, align the spray arm securely onto the hub and press or twist it firmly until it clicks or locks completely into place. You can verify a secure fix by spinning the arm freely by hand.
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