Fisher & Paykel Dishwasher Error U1

⚡ Quick Answer: The U1 error on a Fisher & Paykel dishwasher indicates a water fill fault, typically resulting in insufficient water entering the wash drawer. This is... ✅ DIY Fixable

What Does Error U1 Mean?

The U1 error on a Fisher & Paykel dishwasher indicates a water fill fault, typically resulting in insufficient water entering the wash drawer. This issue can prevent the machine from starting its cycle and may be accompanied by a humming sound and error beeps. Common causes include a blocked or kinked inlet hose or an obstruction in the inlet filter.

Common Symptoms:

  • DishDrawer displays U1 and may not start a cycle
  • Insufficient water entering the wash drawer
  • Possible audible error beeps

Possible Causes

  • Water fill error (insufficient water entering dishwasher) (medium)
  • Blocked or kinked inlet hose or filter obstruction (medium)

How to Fix Error U1

DIY Fix Basic checks for U1 water fill fault

  1. Ensure the dishwasher’s water supply valve is fully open.
  2. Inspect the inlet hose for kinks, twists, or visible damage and straighten if needed.
  3. Check and clean the inlet hose filter screen to remove debris.
  4. Confirm that the spray arm is correctly seated and rotates freely (may affect fill detection on DishDrawer).

Technician Only Diagnose and repair water inlet components

  1. Shut off power and water to the dishwasher.
  2. Remove access panels to inspect the water inlet valve and associated solenoid.
  3. Test the inlet valve for proper operation with a multimeter.
  4. Replace faulty inlet valve or damaged hose as needed.

Parts needed: Water inlet valve, Inlet hose and filter screen

🛑 When to Call a Pro:
  • If water supply checks and inlet filter cleaning do not resolve the fault
  • If the inlet valve or associated wiring tests out of specification

Next step

Choose the next step for U1

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Based on diagnostic data

Most relevant component to inspect

Water Inlet Valve

Controls the flow of hot and cold water into the appliance.

Typical part-only price
$25 - $60
DIY difficulty
Easy
Estimated time
15-30 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

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Technical Specifications

wattage 50W
component Drain Pump
resistance 10-20 ohms
part_number FP-DW-PUMP01
voltage_rating 240V AC

Common Questions

What does U1 error mean on fisher & paykel dishwasher?

U1 error indicates a water fill fault, preventing the machine from starting due to insufficient water.

Can I fix fisher & paykel dishwasher U1 error myself?

Yes, check the water supply valve, inspect the inlet hose for kinks, and clean the inlet filter.

How much does it cost to fix U1 error?

Repair costs range from $50 to $200+, depending on part and labor.

When should I call a technician for U1?

Call a technician if simple checks do not resolve the issue or if the inlet valve is faulty.

Sources & References

Data last verified: 2026-07-25

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