Maytag Dishwasher Error Code F3E1 — What It Means & How to Fix It

What Does This Error Mean?

F3E1 on a Maytag dishwasher means the water temperature sensor (NTC thermistor) is not reading correctly. The dishwasher can't confirm the water is hot enough to clean properly. The sensor is usually inexpensive to replace.

Affected Models

Maytag Tall Tub Dishwasher
Maytag Stainless Steel Dishwasher
Maytag Built-In Dishwasher
Maytag MDB Series

Common Causes

The NTC temperature sensor has failed and is giving a bad reading
A loose or corroded wiring connection to the temperature sensor
The water supply is not hot enough — the home's water heater may be set too low
Hard water scale buildup on the sensor is interfering with its accuracy

How to Fix It

Reset the dishwasher by switching off its circuit breaker for 5 minutes, then turning it back on.

A temporary sensor glitch can sometimes be cleared with a power reset.
Check your home's hot water heater setting. Run the kitchen faucet until the water is hot, then test it with your hand. It should be noticeably hot — around 120°F.

If the incoming water is too cold, the dishwasher may not be able to reach operating temperature, triggering F3E1.
Run hot water at the kitchen sink for 30–60 seconds before starting the dishwasher. This fills the supply line with hot water from the start.

This is a useful habit that also improves wash results.
If F3E1 persists, unplug the dishwasher and check the wiring harness connection to the temperature sensor at the bottom of the tub.

Look for any loose connectors, burn marks, or corrosion on the sensor terminals.
If the wiring looks fine, the NTC sensor itself has failed and needs to be replaced. Order the part using your dishwasher's model number.

The NTC sensor is typically $15 to $40. It is located under the lower spray arm, near the heating element.

When to Call a Professional

If resetting and checking connections doesn't fix F3E1, the temperature sensor needs to be replaced. It is usually located near the heating element at the bottom of the dishwasher tub. A technician can replace it for $80 to $150 including parts and labor.

Frequently Asked Questions

Will F3E1 affect how clean my dishes get?

Yes — if the water isn't hot enough, grease and food don't wash off properly. Dishes may come out with a film or residue. Fix F3E1 before running full loads.

Can hard water cause F3E1?

Indirectly, yes. Hard water leaves mineral scale on the sensor over time. This can cause inaccurate readings and eventually trigger F3E1. Using a dishwasher cleaner monthly helps prevent buildup.

How do I reset the F3E1 error after replacing the sensor?

Switch off the circuit breaker for 5 minutes, then turn it back on. The error should clear once the new sensor is in place and reading correctly. Run a short test cycle to confirm.