Amana · Dishwasher Serious

F8E4 — OWI Sensor Fault

The Optical Water Indicator sensor is dirty or has failed and cannot detect water clarity.

Keep using it?
Limited use only
DIY difficulty
Moderate
Verified against
amana.com ↗

How to fix it

  1. Run a dishwasher cleaning cycle with a citric acid cleaner.
  2. Repeat the cleaning if buildup is heavy.
  3. Disconnect power and access the sump area.
  4. Inspect the OWI sensor and clean the lens manually.
  5. Replace the OWI sensor if cleaning doesn't clear the error.

Why it happens

Typical signs: Cloudy or spotty dishes · Extra rinses · Long cycle times · F8E4 displayed

  • Hard water film on OWI lens Mineral buildup blocks the optical sensor.
  • Failed OWI sensor module LED or photodiode burned out.
  • Wiring fault to sensor Connector loose or corroded.

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.

  • Amana dishwasher OWI sensor Common replacement
    Amazon →
  • Dishwasher cleaner Common replacement
    Amazon →

More Amana dishwasher codes

Clean Light Flashing 1 Time Clean Light Flashing 1x — Control Lockout Clean Light Flashing 7 Times Clean Light Flashing 7x — Heating Element Failure F1E1 F1E1 — Control Board Failure F2E1 F2E1 — Stuck Key on Control Panel F3E1 F3E1 — Thermistor / OWI Sensor Failure F4E1 F4E1 — Door Switch Open

All Amana 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: amana.com.