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KitchenAid Microwave F1E5 Error Code: Humidity Sensor Fault

Quick Answer

KitchenAid F1E5 means the humidity sensor for sensor cooking has failed. This sensor is mounted on the ceiling of the microwave cavity and measures steam output from food to auto-determine cooking time. F1E5 triggers when the sensor reads completely out of range (open circuit or shorted).

KitchenAid F1E5 means the humidity sensor for sensor cooking has failed. This sensor is mounted on the ceiling of the microwave cavity and measures steam output from food to auto-determine cooking time. F1E5 triggers when the sensor reads completely out of range (open circuit or shorted). Important distinction: F1E5 does NOT affect manual time-based cooking. You can continue to use the microwave for all manual functions. The sensor is typically a thermistor-type element that costs $15-30 and is accessible from inside the cavity on most models. On KitchenAid models, the sensor tends to fail from food splatter buildup that eventually corrodes the sensor element. Monthly cavity cleaning prevents this.

KitchenaidMicrowaveSeverity: lowDifficulty: intermediate85% DIY Success
Time to Fix
10–45 min
Difficulty
intermediate
Parts Cost
$15 – $30
Tools Needed
Damp cloth, Mild dish soap

What Does the F1 E5 Code Mean?

F1E5 = humidity sensor failed. Manual cooking still works. Sensor cook functions disabled until sensor replaced ($15-30). Monthly cavity cleaning prevents this.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Humidity sensor corroded from food splatter40%
Sensor element open circuit from age24%
Sensor wire connector corroded14%
Control board sensor input circuit fault12%
Sensor blocked by food buildup on cavity ceiling10%

Symptoms You May Notice

  • F1E5 on display
  • Sensor cook functions do not work
  • Manual time cooking works normally
  • Error appears during sensor cook attempt
  • Display shows F1E5 on power-up

Can you reset a Kitchenaid microwave to clear the F1 E5 code?

Unplug 5 minutes. F1E5 clears when sensor reads within normal range. Manual cooking always works regardless of F1E5.

Tools Required for Diagnosis

Damp clothMild dish soapMultimeter (optional)

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Clean the entire interior cavity

Clean the entire interior cavity, especially the ceiling where the humidity sensor opening is located. Use a damp cloth with mild dish soap. Stubborn splatter may need a microwave-safe bowl of water heated for 3 minutes to loosen deposits.

2

The humidity sensor is inside the cavity ceiling

3

Measure the sensor with a multimeter

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name
KitchenAid/Whirlpool Humidity SensorModel-specific · $15–$30

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPAIR
Estimated Cost: $23 (Parts) vs $450 (New Machine)

Frequently Asked Questions

Can I keep using my KitchenAid microwave with F1E5?
Yes. F1E5 only disables the sensor cooking functions (Sensor Reheat, Sensor Cook, Popcorn sensor). All manual functions (Time Cook, Defrost by time, power levels) work normally.
Is the KitchenAid F1E5 the same as Whirlpool F1E5?
Yes, identical. KitchenAid microwaves are manufactured by Whirlpool. Same sensor, same code, same fix. Parts cross-reference between the brands.
How do I prevent F1E5?
Clean the microwave interior monthly, focusing on the ceiling. Use a microwave-safe cover over dishes to reduce splatter. The humidity sensor fails primarily from food buildup corroding the sensor element over years.

Related Kitchenaid Microwave Error Codes

Code: DOORKitchenAid Microwave Door ErrorCode: HUBWhirlpool Microwave Error Codes (same platform)

Same Fix Works on These Brands

Kitchenaid shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience F1 E5 Errors

This repair applies to most Kitchenaid microwaves with this error code. Common model numbers include:

KMHS120EBS, KMHC319EBS, KMMF330PBS, YKMHS120ES

Last verified for technical accuracy on March 15, 2026