If only the WDT975SAHZ upper rack stays dirty, check rack height, middle spray-arm clearance and loading before suspecting circulation. Confirm the visible symptom before resetting; filters, loading, detergent, water supply and door alignment are safe checks, internal wiring is not. Tall items below, a lowered upper rack, nested bowls or mineral deposits can restrict the middle spray pattern. Use this route when the lower rack cleans normally and no wash-motor warning is displayed. Switch off and cool the tub, re-seat the upper rack evenly, remove items below the arm, separate nested pieces and turn the middle arm gently by hand. Run one normally spaced load. If the upper rack remains dirty or the arm binds, arrange service without forcing or drilling spray holes.
Models covered
Safety first
- Cancel, switch off, close the water valve and let hot dishes cool. Wear gloves near the filter; never tilt a built-in appliance or remove its base or side panels.
What the symptom may indicate
Checks in the right order
- Confirm before acting
Tall items below, a lowered upper rack, nested bowls or mineral deposits can restrict the middle spray pattern.
- Make the appliance safe
Cancel, switch off, close the water valve and let hot dishes cool. Wear gloves near the filter; never tilt a built-in appliance or remove its base or side panels.
- Apply the official check
Switch off and cool the tub, re-seat the upper rack evenly, remove items below the arm, separate nested pieces and turn the middle arm gently by hand.
- Retest once and decide
Run one normally spaced load. If the upper rack remains dirty or the arm binds, arrange service without forcing or drilling spray holes.
Stop and get qualified help when
- Stop for water in the base, an uncontrolled leak, heat or motor code, burning smell, damaged cable or a fault that returns after one empty test.
Next step
Repair, replace a part, or arrange a diagnosis?
Use the checks and stop conditions above to choose a cautious next step. A symptom alone never proves that the appliance has failed.
Resolve it without buying anything
Complete the 4 user-accessible checks in order. If normal operation returns and no warning sign remains, no replacement is indicated.
Replace only the confirmed part
If the checks isolate a worn or blocked component, match its complete reference to the exact appliance model before ordering.
This guide does not identify a replacement part. Do not order a generic component from the symptom alone.
Arrange a diagnosis before replacing the appliance
Stop at any warning sign listed above. A qualified diagnosis should confirm that repair is unsafe, unavailable or uneconomical before an appliance replacement is considered.
Sources used
- Whirlpool — Whirlpool's official support material documents this exact symptom path for WDT975SAHZ; the procedure here keeps only user-accessible checks.
Last checked: 30 August 2026