KitchenAid Dishwasher Error F3E1 — What It Means & How to Fix It

What Does This Error Mean?

F3E1 means your KitchenAid dishwasher's water temperature sensor (NTC thermistor) has an open circuit — the control board is getting no signal at all from the sensor. This happens when the thermistor has failed open, its wiring has broken, or a connector has come loose. The dishwasher will not heat water reliably without a working temperature sensor and will lock out the cycle.

Affected Models

KitchenAid KDTM354DSS
KitchenAid KDTE334GPS
KitchenAid KDFE104HPS
KitchenAid KDFM404KPS
KitchenAid KDPM604KPS

Common Causes

NTC thermistor failed open — its internal resistance has broken the circuit
Wiring harness connector at the thermistor unplugged or corroded
Broken wire in the harness between the thermistor and the control board
Thermistor physically dislodged from its mount inside the wash tub
Control board input circuit for the temperature sensor damaged

How to Fix It

Switch off the circuit breaker for the dishwasher and unplug it if accessible. Do not work on any appliance electronics with power connected.

Safety first — the thermistor is located inside the wash tub near standing water.
Remove the lower spray arm and the lower dish rack to access the bottom of the tub. Locate the NTC thermistor — it is typically clipped into the sump area at the base of the tub and has a two-wire connector.

The thermistor looks like a small cylindrical sensor with two thin wires. It is usually white or grey.
Check that the two-wire connector at the thermistor is firmly plugged in. Unplug it, inspect the pins for corrosion or damage, and firmly reseat it.

Corrosion on sensor connectors is common because this area is exposed to steam and detergent vapour every cycle.
Trace the thermistor wires back toward the control board and look for any pinched, broken, or chafed sections of the harness.

Wires that pass through tight door hinges or brackets are prone to breaking from repeated flexing.
If the wiring is intact but F3E1 persists, use a multimeter set to the resistance (ohms) range. At room temperature, a healthy NTC thermistor should read approximately 10,000–15,000 ohms. A reading of infinite resistance (OL/open) confirms a failed thermistor.

NTC thermistors decrease in resistance as temperature rises — if you measure close to 0 ohms, the thermistor is shorted (see F3E2).
Replace the thermistor if it reads open circuit. Install the new thermistor, reconnect the harness, reassemble the tub, and run a test cycle.

Replacement NTC thermistors for KitchenAid dishwashers are typically $15–$30 and clip into place without tools.

When to Call a Professional

Replacing the NTC thermistor is a straightforward parts swap, but it requires partial disassembly of the dishwasher tub and wiring access. If you are not comfortable working with appliance wiring, contact KitchenAid service or a qualified appliance technician. Bring your model number — thermistor part numbers vary by model year.

Frequently Asked Questions

Will F3E1 damage my dishwasher if I ignore it?

Running a dishwasher without a working temperature sensor risks the heating element running uncontrolled — potentially overheating the water or the tub. Do not ignore F3E1 — address it promptly to avoid secondary damage.

What is an NTC thermistor and why does my dishwasher have one?

NTC stands for Negative Temperature Coefficient — it is a type of resistor whose electrical resistance drops as it gets warmer. Your dishwasher reads this changing resistance to calculate the exact water temperature and control the heating element precisely.

What is the difference between F3E1 and F3E2?

F3E1 means the sensor circuit is open — no signal at all, as if the wire is cut. F3E2 means the sensor circuit is shorted — stuck at a fixed resistance, as if the two wires are touching. Both codes indicate a failed thermistor, but F3E1 usually means a broken connection while F3E2 usually means a physically damaged sensor.