Fisher & Paykel · Dishwasher Minor

U4 — Fisher & Paykel DishDrawer U4 — Fault in the Other Drawer

U4 on a double DishDrawer means there is a fault in the OTHER drawer that is disabling this one. Resolve the other drawer's fault first.

Keep using it?
Yes — fix when convenient
DIY difficulty
Easy
Verified against
fisherpaykel.com ↗

How to fix it

  1. Check the other drawer for its own fault code and clear it first.
  2. Power the unit off at the wall for a minute, then retry both drawers.

Why it happens

Typical signs: One drawer will not run · U4 on the display

  • A fault present on the other drawer An E-fault in the opposite tub disables both.
  • Controller link between the two tubs A loom/connection issue between the drawers.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Dishwasher Multimeter / Test Tools Common replacement
    Amazon →

More Fisher & Paykel dishwasher codes

F30 F30 — Flood Switch Activated F40 F40 — Water Flow Error F50 F50 — Electronics Error F90 F90 — Data / Electronics Error FA0 FA0 — Electronics / Power Supply Error FC0 FC0 — Motor Fault

All Fisher & Paykel codes → All dishwasher codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: fisherpaykel.com.