Maytag Dishwasher F3-E1 error code

F3-E1 means the optical water indicator (OWI) soil sensor or the NTC temperature sensor is reading out of range. The dishwasher cannot judge how dirty the water is or how hot it is, so wash quality suffers.

Also shown as: F3-E1, F3 E1, F3E1

Last updated: October 6, 2026

Quick answer: Maytag dishwasher error code F3-E1: soil/water temperature sensor fault. The most common cause is dirty OWI sensor lens coated with grease or film. Try this first — clean the OWI sensor lens. If that does not clear it, run a hot empty cycle with cleaner.

What causes the F3-E1 error?

  • Dirty OWI sensor lens coated with grease or film
  • Failed OWI (turbidity) sensor
  • Failed NTC temperature sensor
  • Loose or corroded wiring to the sensors
  • Heavy limescale on the sensor
  • Control board misreading the sensor circuit

How to fix Maytag F3-E1 — step by step

Work through these in order, from simplest and safest first. Stop as soon as the code clears.

  1. Clean the OWI sensor lens
    The OWI sensor sits in the sump area at the bottom of the tub. With power off, check the small lens for a greasy film and wipe it gently with a soft cloth. A dirty lens is the most common cause.
    Safety warning: Turn off the breaker before reaching into the tub sump area.
  2. Run a hot empty cycle with cleaner
    Run the hottest cycle empty with a dishwasher cleaner. This dissolves the grease film that coats sensors and can clear the code if the sensor itself is still good.
  3. Check water temperature at the sink
    Run the hot tap at the sink nearest the dishwasher. It should feel hot (around 120°F). Cold incoming water forces long heat-ups that can look like sensor faults.
    Safety warning: Do not scald yourself testing the water.
  4. Replace the sensor if cleaning fails
    If the lens is clean and the code returns, the OWI or NTC sensor has likely failed electrically. Replacement is straightforward for a technician, and a diagnostics cycle recalibrates the new sensor.
    Safety warning: Sensor replacement involves removing the dishwasher's lower panels. Call a technician if unsure.
Related guide: Dishwasher troubleshooting — fix common problems, with links to every dishwasher error code we cover.

When to call a technician

Stop and call a qualified technician if any of these apply:
  • The code returns after cleaning the sensor and running a cleaner cycle
  • The sensor lens is cracked or visibly damaged
  • You need the sensor tested or replaced
  • The dishwasher is under warranty

Frequently asked questions

What does the OWI sensor actually do?

It shines light through the wash water to judge soil level, so the dishwasher can adjust cycle time and water use. When it fails, cycles run blind.

My dishes come out dirty with F3-E1. Is that related?

Yes. Without soil and temperature readings, the dishwasher may cut cycles short or skip heating, leaving food and film behind.

Can hard water cause F3-E1?

Yes. Limescale coats the sensor lens and insulates it. Regular descaling helps in hard-water areas.

Sources

Every meaning and fix above was checked against official manufacturer documentation:

FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.

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