How to Fix It Not Draining on a Whirlpool WDT970SAKZ Dishwasher — Step-by-Step Instructions
Step-by-step instructions for the Whirlpool WDT970SAKZ (built-in dishwasher, third rack, 47 db). Parts and access points can differ slightly by production year — the steps below cover the common layout for this platform, and the model notes flag its quirks.
Standing dishwasher water can hide glass shards — bail with a cup, not bare cupped hands.
Tools
- Cup and towels for bailing
- Screwdriver
- Wet/dry vac (helpful)
Parts
- None for most fixes; drain pump if the whole path checks clear
Step by step
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1 Bail the standing water
Cup, towels, or wet-vac the pool so you can see the tub floor.
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2 Clean the filter and sump
Twist out the filter (see the filter guide) and check the sump beneath for the usual suspects: glass, labels, a pistachio shell perfectly sized to block the drain port.
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3 Check where the hose ends
Under the sink: is the drain hose kinked? If it connects to a garbage disposal installed in the last year, verify the knockout plug was punched out — the #1 "new disposal" mystery.
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4 Clear the air gap if you have one
The chrome cylinder by the faucet: pop its cap and clean out the debris. A clogged air gap backs the whole system up.
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5 Run a rinse cycle and listen
A healthy drain pump makes a steady hum with gurgling water. Silence or grinding with a clear path = the drain pump itself — cheap part, moderate access.
Whirlpool WDT970SAKZ notes & error codes
A flashing Clean light is Whirlpool’s way of reporting a stored fault rather than a random blink. Running the diagnostic cycle reads the actual code and saves a lot of guesswork on a machine the customer describes only as "acting up".
| Code | What it means |
|---|---|
| F8 E4 | Flood or overfill condition |
| F9 E1 | Drain fault |
| F7 E1 | Heating fault |
| F6 E4 | Water inlet fault |
| Clean light flashing | Stored fault — enter diagnostics to read it |
Full details for this machine — common problems, causes, and costs — are in the Whirlpool WDT970SAKZ repair guide. The general version of these instructions is here.
If the path is clear and the pump is silent, replacing it means tipping the machine out from the counter on most models — a fair place to hand off, and still a modest repair bill. If you'd rather skip it entirely, find a dishwasher repair pro near you →
What this repair costs professionally
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