Fisher & Paykel Dishwasher Error U4

⚡ Quick Answer: The Fisher & Paykel dishwasher U4 error indicates a fault in the opposite drawer of your DishDrawerâ„¢ model. This can prevent one drawer from operati... ✅ DIY Fixable

What Does Error U4 Mean?

The Fisher & Paykel dishwasher U4 error indicates a fault in the opposite drawer of your DishDrawerâ„¢ model. This can prevent one drawer from operating, often leading to failed wash cycles or unusual noises. To resolve the issue, check the other drawer for any obstructions or faults that may be causing the malfunction.

Common Symptoms:

  • Display shows U4 error
  • One drawer may not operate because the other drawer has a fault
  • Wash cycle fails to start or stops

Possible Causes

  • Fault detected in the opposite/rival drawer on a double‑drawer DishDrawerâ„¢ dishwasher (high)

How to Fix Error U4

DIY Fix Check and clear the other drawer fault

  1. Turn off and open the other drawer on your Fisher & Paykel DishDrawerâ„¢ dishwasher.
  2. Inspect for any obvious issues (items jammed, door not fully closed, water in drawer).
  3. Close the drawer securely and try clearing the error per your model’s procedure (refer to user manual).
  4. Restart the dishwasher cycle to see if U4 has cleared.

Technician Only Diagnose and resolve the root issue in the opposite drawer

  1. Run a diagnostic/test cycle on both drawers to identify specific faults in the non‑working drawer.
  2. Check door switches, rack sensors, and wiring harnesses between drawers for faults.
  3. Verify that drain and fill operations are functioning correctly in both drawers.
  4. Replace any defective components found during diagnostics (e.g., sensor, door latch).

Parts needed: Diagnostic tool (optional), Replacement sensors or switches (if faulty), Wiring harness or control module components (if needed)

🛑 When to Call a Pro:
  • If the error persists after clearing the other drawer fault and basic checks.
  • If there are electrical smells, water leaks, or repeated faults.
  • If internal components appear damaged or inaccessible without special tools.

Technical Specifications

wattage 50W
component Drain Pump Assembly
resistance 10-30 ohms
part_number FP-DW-PUMP-001
voltage_rating 240V AC

Common Questions

What does U4 error mean on Fisher & Paykel dishwasher?

The U4 error indicates a fault in the opposite drawer, preventing one drawer from operating.

Can I fix Fisher & Paykel dishwasher U4 error myself?

Yes, you can check the other drawer for obstructions and follow clearing procedures from your user manual.

How much does it cost to fix U4 error?

Repair costs range from $50 to $250+, depending on parts and labor.

When should I call a technician for U4?

Call a technician if the error persists after checks, or if you notice electrical smells or leaks.

Sources & References

Data last verified: 2026-03-13

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