Whirlpool Dishwasher Error Code 8-1
In short
Slow drain
Common causes
- 1Plugged garbage disposal or its knock-out plug not removed
- 2Drain-loop check valve stuck
- 3Plugged or kinked drain hose

Step-by-step troubleshooting
- 1
If a garbage disposal was just installed, confirm its knock-out plug was removed
- 2
Run the disposal and check the drain hose for kinks or clogs
- 3
Check the drain-loop check valve for a stuck flap
You might also notice
- Water left in the bottom of the tub
- Dishwasher drains slowly
Parts & difficulty
Repair difficulty
Easy — DIY friendlyRather have a pro handle it?
A vetted local technician can come out and diagnose your Whirlpool dishwasher at home.
What this repair involves
Here's what a professional technician does to resolve this issue:
Clear the drain path: disposal knock-out plug, drain hose and check valve
This repair requires water pressure gauges, spray arm diagnostic tools, and leak detection equipment. Most homeowners find it safer and more cost-effective to have a licensed technician handle it.
Common questions
What does Whirlpool error code 8-1 mean?
Whirlpool error code 8-1 indicates: Slow drain. This is a medium-severity issue affecting your dishwasher.
How do I fix Whirlpool error code 8-1?
First unplug the dishwasher or switch off its circuit breaker. (1) If a garbage disposal was just installed, confirm its knock-out plug was removed (2) Run the disposal and check the drain hose for kinks or clogs (3) Check the drain-loop check valve for a stuck flap If these steps don't resolve the error, contact a professional.
How do I know if my dishwasher has error 8-1?
Besides the error code on the display, common signs include: Water left in the bottom of the tub; Dishwasher drains slowly. If you notice any of these symptoms, check your dishwasher's display panel for error code 8-1.
How much does it cost to fix Whirlpool 8-1?
The cost depends on which part caused 8-1, and that is confirmed at the diagnostic visit. EasyBear: A technician arrives, inspects your appliance, and diagnoses the problem at no charge. If you decline the repair, you pay nothing — not even for the visit. Call (415) 795-7300 to book.
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