Warning: Disconnect power before servicing.
ErrBase

Whirlpool Microwave F1E6 Error: Magnetron Relay Fault

Quick Answer

Whirlpool F1E6 is a magnetron relay fault and is closely related to F1E4 (power relay). While F1E4 detects the relay stuck CLOSED (dangerous - magnetron could run uncontrolled), F1E6 detects the relay not responding at all or stuck OPEN (magnetron will not turn on).

Whirlpool F1E6 is a magnetron relay fault and is closely related to F1E4 (power relay). While F1E4 detects the relay stuck CLOSED (dangerous - magnetron could run uncontrolled), F1E6 detects the relay not responding at all or stuck OPEN (magnetron will not turn on). F1E6 is less dangerous than F1E4 because the failure mode is 'microwave will not heat' rather than 'microwave runs uncontrolled.' However, both codes indicate the same component: the relay on the control board that switches high-voltage power to the magnetron transformer. The control board needs replacement. As with F1E4, try the 5-minute unplug reset first - a transient voltage spike can cause a false relay detection.

WhirlpoolMicrowaveSeverity: highDifficulty: advanced60% DIY Success
Time to Fix
5–120 min
Difficulty
advanced
Parts Cost
$100 – $200
Tools Needed
None for user - professional repair recommended

What Does the F1 E6 Code Mean?

F1E6 = magnetron relay not responding (stuck open or failed). Less dangerous than F1E4 (stuck closed). Microwave will not heat. Control board replacement needed. Try 5-minute unplug first.

Most Likely Causes

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

Magnetron relay contacts failed open40%
Control board relay driver circuit failed24%
Power surge burning relay coil14%
Relay solder joint cracked from thermal cycling12%
Magnetron drawing excessive current burning relay10%

Symptoms You May Notice

  • F1E6 on display
  • Microwave turntable and light work but no heat
  • Microwave appears to run but food stays cold
  • F1E6 appears on power-up
  • Error persists after reset

Can you reset a Whirlpool microwave to clear the F1 E6 code?

Unplug 5 minutes. F1E6 is less urgent than F1E4 - the microwave will not heat but also will not run uncontrolled.

Tools Required for Diagnosis

None for user - professional repair recommended

Diagnostic Checklist

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

1

Unplug for 5 full minutes

Unplug for 5 full minutes. Plug in. If F1E6 does not return, it was a transient relay detection from a voltage spike.

2

The control board needs replacement

3

Alternative

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 · $100–$200

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs
Labor Approach
Our Verdict
REPLACE
Estimated Cost: $150 (Parts) vs $375 (New Machine)

Frequently Asked Questions

What is the difference between F1E4 and F1E6?
F1E4 = relay stuck CLOSED (dangerous - magnetron could run uncontrolled). F1E6 = relay stuck OPEN or not responding (microwave will not heat but is safe). Both require the same board replacement. F1E4 is more urgent from a safety standpoint.
My microwave runs but does not heat. Is that F1E6?
Not necessarily. A running microwave that does not heat could also be a failed magnetron, high-voltage diode, or capacitor - none of which display error codes. F1E6 is only the diagnosis if the code is actually displayed. If no code is shown, a technician needs to test the high-voltage components.
Is F1E6 repair worth it on an 8-year-old microwave?
For a countertop microwave ($50-150 new), probably not. For an over-the-range model ($200-600 new plus installation), a $150-300 board repair is usually worthwhile unless other components are also failing.

Related Whirlpool Microwave Error Codes

Code: HUBWhirlpool Microwave Error CodesCode: F1E4Whirlpool F1E4: Power Relay Stuck

Same Fix Works on These Brands

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

Maytag washerMaytag Washer 5D Code: Too Many Suds (Fix It Fast)Maytag washerAll Maytag Washer Error Codes: Complete Lookup GuideMaytag washerHow to Reset a Maytag Washer (3 Methods That Work)Maytag washerMaytag Washer Troubleshooting: Fix 12 Common ProblemsMaytag washerMaytag Washer LOC Code: How to Unlock the ControlsMaytag washerMaytag Washer Not Draining? Here's What to Check

Models Known to Experience F1 E6 Errors

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

WMH31017HZ, WMH32519HZ, WMH53521HZ, WMH76719CZ

Last verified for technical accuracy on March 15, 2026