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Whirlpool Microwave Error Codes: F1E4, F1E5, F1E6, F2E1, F6 Guide

Quick Answer

Whirlpool microwaves use the same F/E code format as other Whirlpool appliances. The F1 prefix indicates a control board or component relay fault: F1E4 means the power relay on the control board is stuck (the microwave thinks the magnetron relay is energized when it should not be - a safety shutdown).

Whirlpool microwaves use the same F/E code format as other Whirlpool appliances. The F1 prefix indicates a control board or component relay fault: F1E4 means the power relay on the control board is stuck (the microwave thinks the magnetron relay is energized when it should not be - a safety shutdown). F1E5 is a humidity sensor fault. F1E6 means the magnetron relay itself has failed. F2E1 indicates a keypad (membrane switch) short - a key is being detected as pressed when it should not be. F6 is a communication fault between boards. The most important safety note: F1E4 and F1E6 are microwave-specific safety shutdowns. If the magnetron relay sticks closed, the microwave could run uncontrolled. These codes should not be repeatedly reset without repair.

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About These Whirlpool Microwave Error Codes

Whirlpool microwave F/E codes: F1E4 = power relay stuck (safety shutdown), F1E5 = humidity sensor, F1E6 = magnetron relay, F2E1 = keypad short, F6 = communication.

Most Common Error Codes

Control board power relay stuck (F1E4)40%
Keypad membrane switch shorted (F2E1)24%
Magnetron relay failure (F1E6)14%
Inter-board communication loss (F6)12%
Humidity sensor fault (F1E5)10%

Symptoms You May Notice

  • Error code on display
  • Microwave will not start
  • Microwave runs without user input (dangerous - unplug immediately)
  • Keypad beeping randomly
  • Display shows code then goes blank
  • Door error message

Tools Required for Diagnosis

Multimeter (for qualified technicians only)Screwdriver set

How to Identify Your Error Code

1

Unplug the microwave for 5 full minutes

Unplug the microwave for 5 full minutes. This resets the control board and discharges capacitors partially. Plug back in. If the code does not return, it was a transient event from a power surge.

2

For F2E1 (keypad short)

3

For F1E4 or F1E6 (relay faults)

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
Whirlpool Microwave Control BoardModel-specific · $80–$200
Whirlpool Microwave Touchpad/MembraneModel-specific · $50–$120

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPLACE
Estimated Cost: $125 (Parts) vs $375 (New Machine)

Frequently Asked Questions

Is it safe to keep using my microwave with an error code?
For F2E1 (keypad), the microwave is not dangerous but may not function. For F1E4 and F1E6 (relay faults), do NOT continue using - these are safety shutdowns indicating a relay that controls the magnetron is malfunctioning. An uncontrolled magnetron is a fire and radiation hazard.
Whirlpool microwave repair vs replace - when does it make sense?
Countertop microwaves under $150: replace rather than repair. Over-the-range microwaves ($200-500): repair makes sense if the unit is under 5 years old. The control board ($80-200) plus labor ($100-150) totals $200-350, which is less than a new OTR install.
Why does my Whirlpool microwave show F2E1 after steaming food?
Steam from cooking enters the vent area and condenses on the touchpad membrane switch, causing phantom key presses. Clean the touchpad after steam-heavy cooking. If F2E1 is chronic, the membrane has absorbed moisture and needs replacement.

Related Whirlpool Microwave Error Codes

Code: F1E4Whirlpool Microwave F1E4: Power Relay FaultCode: DOORWhirlpool Microwave Door ErrorCode: F2E1Whirlpool Microwave F2E1: Keypad Short

Same Fix Works on These Brands

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

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Models Known to Experience HUB Errors

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

WMH31017HZ, WMH32519HZ, WMH53521HZ, WMH76719CZ, WMH78019HZ, KMHS120EBS

Last verified for technical accuracy on March 15, 2026