Fisher & Paykel Dishwasher Error Code U4

What Does Error Code U4 Mean on a Fisher & Paykel Dishwasher?

Not draining — drain fault.

Fisher & Paykel's DishDrawer dishwashers use a unique drawer design. U4 indicates the unit cannot drain water within the expected time.

What Causes Error Code U4?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

1. 1
   Filter/sump clogged 50% of cases
2. 2
   Drain hose kinked or improperly routed 25% of cases
3. 3
   Drain pump failure 25% of cases

How to Fix Fisher & Paykel Dishwasher Error Code U4

1. 1

   Clean the filter

   Remove and clean the filter in the bottom of the drawer.

2. 2

   Check drain hose

   Confirm proper routing with high loop.

3. 3

   Test drain pump

   If filter and hose clear, pump may have failed.

   🔩 F&P dishwasher drain pump ($70–$140)

How to Reset Error Code U4

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

When to Call a Professional

Related Error Codes

Find Replacement Parts

Use these links to find the exact replacement parts for your Fisher & Paykel Dishwasher:

External links — ApplianceErrors.com is not affiliated with these retailers.

Frequently Asked Questions