Whirlpool WDT970SAHV0 Diverter Valve Motor Failure – What Part Fixes This?
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Understanding the Problem
The diverter valve motor (diverter assembly) in the Whirlpool WDT970SAHV0 directs wash water between the upper and lower spray arms. If the motor or diverter cam fails, water will be sent to only one rack (usually the lower), resulting in poorly cleaned items on the other rack. Failure can be electrical (motor windings, connectors) or mechanical (sticking cam, broken gears, debris), and may occur gradually or suddenly. Diagnosing the diverter requires listening and observing during a cycle: you should hear the motor move and see the diverter change position when the cycle changes to spray the other rack. If you hear a humming motor with no movement, see no movement at all, or the upper rack remains dry while the dishwasher otherwise runs normally, the diverter motor or its mechanical linkage is the likely fault. Replacement typically resolves the issue, but verify wiring and control signals before replacing the part to avoid unnecessary costs.
Common Symptoms
Upper rack not getting water while lower rack cleans normally; clicking or humming from the diverter area; intermittent redirection of water; no diverter movement during cycle changes.
Common Causes
- Worn or burned-out diverter motor windings
- Broken or stripped diverter cam/gears or debris jamming the diverter
- Faulty wiring or control board not sending power/command to the motor
Popular Parts That Fix This Problem
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Helpful Repair Tip
Run a diagnostic cycle and watch/listen for the diverter action; if the motor hums but the cam doesn’t move, the gears or cam are likely bad. Confirm with a continuity/resistance check on the motor windings (power off) and with a voltage check during a run (power on) if you’re comfortable and safe working with live circuits.
Frequently Asked Questions
How do I test whether the diverter motor is bad?
Start a cycle and put the dishwasher in a part of the cycle where the diverter should switch (or run diagnostics per service manual). Listen for motor movement and watch the diverter cam. With power off, unplug the unit and access the diverter: check for continuity across the motor terminals with a multimeter (no continuity or infinite resistance indicates an open motor). If you’re comfortable and know how to safely work with live circuits, you can check for voltage at the diverter connector during the cycle change — presence of proper voltage but no movement usually means the motor or mechanical coupling has failed.
Can I replace the diverter motor myself and how difficult is it?
Yes — a competent DIYer can replace the diverter motor, but accessibility varies by dishwasher design. Typical steps: disconnect power, turn off water, remove lower kickplate and possibly the inner tub access panels to reach the diverter, disconnect wiring and mounting screws, swap in the replacement assembly (and seals/gaskets), then reassemble. Expect 45–90 minutes if you’re familiar with appliances. If you’re not comfortable working around live circuits, or if the control board might be at fault, consider hiring a qualified appliance technician.
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