I’m dealing with a Kenmore dishwasher (model 665.13409N412) that won’t drain at all. The drain pump doesn’t even make a sound, and it seems like there’s no power reaching it during the drain cycle. I’ve already replaced the pump, checked for clogs, and inspected the drain line. If you’re stuck at the same point, here’s what to check next.
Quick Answer
If your dishwasher has no power to the drain pump, the problem is usually a control board issue, wiring fault, or safety switch (like float switch or door switch). You’ll need to confirm voltage at the pump to narrow it down.
Step-by-Step: Fix No Power to Drain Pump
Step 1: Confirm No Voltage at the Pump
You’re already on the right track.
- Use a multimeter on the pump wires
- Run a drain cycle
- Check for voltage (typically ~120V AC)
👉 If there’s no voltage, the issue is upstream (not the pump).
Step 2: Check the Door Switch
Dishwashers won’t activate components if the door isn’t detected as closed.
- Inspect door latch and switch
- Test for continuity
- Make sure it clicks properly
👉 A faulty door switch can cut power to the drain system.
Step 3: Inspect the Float Switch
Even if it “clicks,” it may still be faulty.
- Remove and test the float switch with a multimeter
- Ensure it’s not stuck or blocked
👉 This switch can prevent draining if it sends incorrect signals.
Step 4: Check Wiring Harness
This is very common and often missed.
- Inspect wiring from:
- Control board → pump
- Look for:
- Loose connectors
- Burnt wires
- Corrosion
👉 No power often = broken or loose wire.
Step 5: Inspect the Control Board Relay
This is the most likely issue at your stage.
- The control board sends power to the pump
- If relay fails → no voltage output
👉 Cases like yours often end up being a faulty control board relay.
Step 6: Check Other Related Components (Just to Confirm)
Even though you replaced some parts, verify:
- Drain solenoid (if applicable)
- Check valve / check ball
- Garbage disposer plug (if connected)
👉 These usually affect flow, not power, but worth confirming.
Extra Tips and Best Practices
- Always test voltage before replacing parts
- Take photos before disconnecting wiring
- Use OEM-compatible components
- Check the tech sheet (often behind kickplate)
Common Mistakes to Avoid
- Replacing the drain pump again (you already ruled it out)
- Ignoring wiring issues
- Skipping voltage testing
- Replacing the control board without confirming inputs
FAQ
Why is my drain pump not getting power?
Because the control board isn’t sending voltage, or a safety switch is interrupting it.
Can a control board fail partially?
Yes. It can run cycles but fail to power specific components like the pump.
Should I replace the control board now?
Only after confirming:
- No voltage at pump
- Wiring is intact
- Switches are working
Conclusion
If your dishwasher has no power to the drain pump, and you’ve already replaced the pump and checked for clogs, the issue is almost always electrical. Focus on the wiring, door/float switches, and especially the control board relay. A simple voltage test will confirm the next move.
Useful References
- https://www.repairclinic.com/RepairHelp/Dishwasher-Repair-Help
- https://www.searspartsdirect.com/diy/symptom/dishwasher-repair/1234581/not-draining/dsh
- https://www.familyhandyman.com/project/how-to-repair-a-dishwasher/
