KitchenAid Dishwasher F1E1 Code: Causes & Fix

What is the KitchenAid Dishwasher F1E1 error?#

F1E1 on a KitchenAid dishwasher means the control board has lost its signal from the water-temperature sensor — the circuit reads open, so the machine can no longer confirm how hot the wash water is. It is not dangerous to the house, but the dishwasher will stretch cycles out for hours trying to reach a temperature it cannot measure, so stop running long cycles until it is checked. The first thing I look at is the thermistor down in the sump, because a failed NTC thermistor is by far the most common trigger listed in the table above.

F1E1 on a KitchenAid Dishwasher: likely causes and repair cost#

On a KitchenAid Dishwasher, the F1E1 code signals: water temperature sensor open.

Typical professional repair: $75–$200 · Difficulty: moderate · usually a technician job

Symptoms that often accompany F1E1: Wash cycles run much longer than expected; Water temperature seems incorrect; Normal cycle takes over 3 hours

Technician diagnostic sequence for F1E1:

1. Locate the thermistor sensor in the sump area near the wash pump
2. Disconnect and measure resistance: approximately 55,000 ohms at 77F (25C)
3. An open circuit (infinite) reading confirms sensor failure
4. Check wiring harness for breaks, especially near heat sources in the sump area

Parts a technician may check or replace: Thermistor/OWI Sensor Assembly; Sensor Harness

Field note: On KitchenAid KDTE and KDTM dishwashers, the thermistor is often combined with the OWI (Optical Water Indicator) in a single assembly. An open thermistor causes the dishwasher to default to extended wash times because it cannot verify water temperature.

How to troubleshoot the F1E1 error yourself#

Start with a hard reset: kill power at the breaker for a couple of minutes and let the board reboot. If F1E1 comes straight back, the fault is real and lives in the sensor circuit rather than the software. From there the safe owner checks are visual — pull the lower rack and the filter, look at the thermistor and its harness in the sump area near the wash pump, and check the connector for corrosion or a loose seat, which is the third cause in the table above. What you should not do is start probing resistance with the machine powered; measuring the thermistor and tracing a broken harness back to the board is a job for a technician with the wiring diagram. If the reset does not clear it and the connector looks clean, that is my line for calling a pro rather than swapping parts blindly.

Is the KitchenAid Dishwasher F1E1 error worth fixing?#

For a KitchenAid dishwasher this is one of the easier "yes, repair it" calls. The professional repair range shown in the table above is a small slice of what a comparable new KitchenAid costs, and a thermistor or harness repair restores the machine to full function with years of life left. I only lean toward replacement when the dishwasher is already near the end of its service life and stacking other faults — a tub leak, a dying pump, a cracked sump. A single open-sensor fault on an otherwise sound KitchenAid is worth fixing every time.

KitchenAid Dishwasher F1E1: frequently asked questions#

What does the F1E1 error mean on a KitchenAid Dishwasher?#

It means the water-temperature sensor circuit reads open, so the control board cannot verify wash-water temperature. The board responds by extending cycles instead of heating blindly.

Is it safe to keep using a KitchenAid Dishwasher that shows the F1E1 error?#

There is no shock or flood hazard, but the dishwasher will run abnormally long cycles and may not sanitize properly. I would stop using it for anything that needs hot water until the sensor is repaired.

Can I clear the F1E1 error myself, or do I need a technician?#

You can try a breaker reset and inspect the sump connector for corrosion. If F1E1 returns, the thermistor or harness needs testing and replacement, which is a technician job.

How much does it cost to repair the F1E1 error on a KitchenAid Dishwasher?#

It falls in the professional repair range shown in the table above — a moderate job, since the thermistor and harness sit in the sump and the fault must be confirmed before replacing parts.

Which parts usually fail when a dishwasher throws the F1E1 code?#

The NTC thermistor is the leading cause, followed by broken wiring to the sensor and connector corrosion. On many KitchenAid models the thermistor is combined with the OWI sensor in one assembly.

Is a KitchenAid Dishwasher with the F1E1 error worth repairing?#

Almost always yes. The repair costs a fraction of a new machine and fixes a single failed sensor, so unless the dishwasher is very old with other problems, repair is the clear choice.

Why does ntc thermistor failure trigger the F1E1 error?#

The NTC thermistor changes resistance with temperature so the board can read the water. When it fails open, the board sees an infinite reading, cannot trust any temperature, and posts F1E1.