KitchenAid · Dishwasher

E1

Thermistor Fault

Severity

Medium

Your KitchenAid Dishwasher stopped working and is showing error E1, which corresponds to a fault called "Thermistor Fault". This is one of the most searched error codes for this appliance — you are not alone, and there is a clear fix.

Owner's Summary

Your KitchenAid dishwasher's temperature sensor has a fault. The machine is running without proper temperature control. The thermistor is the most likely cause and is an inexpensive repair.

Symptoms

KitchenAid dishwasher not heating water, running cold, E1 or 1-1 error

Common Causes

Open or shorted NTC thermistor
Thermistor connector corroded or loose
Wiring harness fault to thermistor
PCB ADC failure

How to Fix

1 Test thermistor resistance at room temperature — should be 10k–50k ohms
2 Check thermistor connector and clean with contact cleaner
3 Test wiring harness continuity
4 Replace thermistor if out of spec
5 Replace PCB if thermistor tests good

Tools You'll Need

Multimeter Electrical Contact Cleaner

These are simple, low-risk fixes most homeowners can do with tools already in a basic toolbox.

Technical Explanation

KitchenAid dishwashers share the Whirlpool platform — E1 or fault code 1-1 indicates the control board reads an out-of-range thermistor signal, either open circuit or short circuit. The board disables the heater relay as a safety precaution.

Is It Safe to Keep Using?

No immediate safety risk. Fix within a week.

Technician's Pro Tip

KitchenAid and Whirlpool dishwashers share the same thermistor part numbers in most cases. The thermistor is located in the sump assembly, pushed into a rubber grommet. Replacement requires no tools and takes under 5 minutes once the lower rack is removed.

Related Codes

E1 — Samsung Dishwasher

Water Supply Error

High

E2 — Samsung Dishwasher

Water Temperature Too High

Medium

E3 — Samsung Dishwasher

Water Not Heating

Medium

Frequently Asked Questions

What does error code E1 mean on a KitchenAid Dishwasher?

Code E1 on a KitchenAid Dishwasher indicates "Thermistor Fault." In practice, the most common trigger is open or shorted NTC thermistor. Severity is rated medium, and typical repair costs range from $15 to $250.

Can I fix E1 myself, or do I need a technician?

Many cases of E1 can be resolved without a technician. The first step to try: test thermistor resistance at room temperature — should be 10k–50k ohms. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my dishwasher with code E1 showing?

No immediate safety risk. Fix within a week.

How much does it cost to repair E1 on a KitchenAid Dishwasher?

Repair costs for code E1 typically range from $15 to $250. Thermistor: $15–$40; PCB: $100–$250. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$15 – $250

Thermistor: $15–$40; PCB: $100–$250