I’ve been dealing with a KitchenAid dishwasher that runs intermittently but doesn’t clean dishes at all. It fills with water, starts and stops the wash cycle for hours, and the spray arms don’t seem to move. Even after replacing the sump, motor, and control board, the issue persists with a 4-3 error code.
If your dishwasher behaves like this, you’re likely facing a deeper issue beyond just parts replacement.
Quick Answer
If your KitchenAid dishwasher runs but doesn’t clean, the most likely causes are a faulty circulation pump system, loose/burnt wiring, or poor door latch contact.
Even new parts can fail if wiring or connections are compromised.
Step-by-Step Solution
1. Understand what error code 4-3 means
The 4-3 error code typically points to a wash pump (circulation pump) circuit problem.
This means:
- Pump is not running properly
- Or power is not reaching the pump consistently
2. Check if spray arms are actually moving water
Open the dishwasher mid-cycle:
- Are dishes wet on the top rack?
- Do spray arms move position?
If:
- Top rack is dry
- No strong water movement
➡️ The circulation pump is not working correctly
3. Inspect the circulation pump (even if replaced)
Even a new pump can fail due to:
- Wrong model installed
- Internal motor defects
- Excess electrical load
Signs:
- Pump runs for 1–2 seconds then stops
- Repeats on/off cycles
➡️ This indicates a pump circuit or motor issue
4. Check for burnt or damaged wires (CRITICAL)
You mentioned burnt wires near the control board — this is a major clue.
Steps:
- Turn off power
- Inspect wiring harness to:
- Control board
- Circulation pump
Look for:
- Melted insulation
- Loose connectors
- Corrosion
➡️ Damaged wiring can prevent stable power delivery
5. Reseat and secure all electrical connections
Loose connections are a very common hidden issue.
Do this:
- Disconnect and reconnect all plugs
- Ensure tight contact
- Clean terminals if needed
Some users fixed this issue just by securing connectors properly.
6. Inspect the door latch and actuator
A faulty door latch switch can interrupt the wash cycle.
Check:
- Door closes firmly
- Latch engages fully
- No play or misalignment
If the latch doesn’t make proper contact:
➡️ Dishwasher may start/stop repeatedly
7. Verify filter and drainage setup
Even though your filter is clean, also check:
- Drain hose has proper slope
- No backflow of dirty water
Poor drainage can affect wash performance.
8. Confirm correct replacement parts
Not all replacement pumps are equal.
If:
- Pump draws too much power
➡️ Control board may shut it down
Always ensure:
- Exact model compatibility (KDTE104ESS4)
Extra Tips and Best Practices
- Always inspect wiring before replacing parts
- Avoid cheap aftermarket pump replacements
- Run a full diagnostic cycle after repairs
- Keep internal components clean (filter, arms, sump)
- Check for moisture damage near control board
Common Mistakes to Avoid
❌ Replacing multiple parts without checking wiring
❌ Ignoring burnt wires (major issue)
❌ Assuming new pump = working pump
❌ Overlooking door latch alignment
❌ Skipping connector inspection
FAQ Section
Why does my dishwasher start and stop during the wash cycle?
This usually happens when the circulation pump loses power intermittently due to wiring or control issues.
Can burnt wires cause dishwasher not to clean?
Yes. Burnt wires can interrupt power to the pump, causing weak or no water circulation.
Why is my dishwasher wet but dishes are still dirty?
Because water fills, but spray arms are not circulating water properly, often due to pump failure.
Conclusion
If your KitchenAid dishwasher runs but doesn’t clean, focus on the circulation system and wiring, not just replacing parts. The 4-3 error code strongly points to a pump circuit issue.
Start with wiring inspection and connections before replacing anything else.
That’s where most people miss the real problem.
Reference Links
https://www.repairclinic.com/RepairHelp/Dishwasher-Repair-Help
https://www.partselect.com/Dishwasher+not-cleaning+repair.htm
https://www.searspartsdirect.com/diy/repair-guide/how-to-fix-a-dishwasher-that-wont-clean
