GE Dishwasher Error Code E1 — What It Means & How to Fix It

What Does This Error Mean?

E1 on a GE dishwasher means the water temperature sensor (thermistor) is not reading correctly. The dishwasher can't confirm the water is at the right temperature to wash. A reset often helps — but the sensor may need replacing.

Affected Models

GE Built-In Dishwasher
GE Profile Dishwasher
GE Stainless Steel Dishwasher
GE Top Control Dishwasher

Common Causes

The NTC thermistor (temperature sensor) has failed and is sending bad readings
A loose or corroded wire connection to the thermistor
Hard water scale buildup on the sensor is causing inaccurate readings
The water heater in the home is set too low, preventing the dishwasher from reaching temperature

How to Fix It

Switch off the dishwasher circuit breaker for 5 minutes, then turn it back on. Run a test cycle.

A temporary sensor glitch can sometimes be cleared with a full power reset.
Before starting the dishwasher, run the kitchen sink hot water for 30–60 seconds. This ensures the supply line has hot water from the start.

If the incoming water is too cold, the dishwasher may not reach the required temperature and trigger E1.
Check your home's water heater setting. The water should reach at least 120°F at the kitchen tap.

Run the kitchen faucet and feel the water — it should be noticeably hot, not just warm.
If E1 persists, unplug the dishwasher and check the wiring connection to the thermistor at the bottom of the tub. Reconnect any loose plugs.

Look for corrosion or burn marks on the connector terminals.
If wiring looks fine, the thermistor has likely failed. Order a replacement matched to your GE model number (found on the sticker inside the door frame).

GE thermistors typically cost $15 to $35. The part is located near the heating element at the tub base.

When to Call a Professional

If cleaning and resetting doesn't fix E1, the thermistor needs to be tested with a multimeter. It is located near the heating element at the base of the dishwasher tub. A technician can test and replace it for $80 to $150 including parts and labor.

Frequently Asked Questions

Will E1 affect how clean my dishes get?

Yes — if the water isn't hot enough, grease and food residue won't wash off properly. Dishes may come out looking dirty or with a white film. Fix E1 before running full loads.

Can hard water cause E1 on a GE dishwasher?

Over time, yes. Mineral scale builds up on the thermistor and can cause inaccurate readings. Running a dishwasher cleaning cycle with citric acid or white vinegar monthly helps prevent this.

How do I reset E1 after replacing the thermistor?

Switch the circuit breaker off for 5 minutes, then back on. Start a short test cycle. If the new thermistor is working, E1 will not return.