Error code · Microwave

Whirlpool Built-In Microwave Code F4 E2: Thermistor or Sensor Circuit

Medium · inspection needed

Code: F4 E2
Appliance: Microwave
Brand: Whirlpool
Warranty: 30-day workmanship

What F4 E2 means

F4 E2 is listed for Whirlpool built-in microwaves and microwave drawers such as WMC50522AS, and it names the microwave sensor or thermistor, the microwave appliance manager, or the wiring. If you see F4 E2 in the display, the control believes something in that sensor circuit is wrong. The guidance stops at a power reset and gives no failed part, so this code tells us where to test rather than what to replace.

Common causes of F4 E2

Thermistor or sensor on the microwave side
Appliance manager board
Wire harness between the sensor and the board

✓ One safe check you can try

1. Shut the microwave's breaker off. 2. Let sixty seconds pass before you turn it back on. 3. After power returns, look for F4 E2 for a minute. 4. A clear display and a brief normal cycle mean the oven is working. 5. A returning F4 E2 means it needs a sensor circuit test.

! Why to stop there

A clear display after a reset does not prove the sensor circuit is healthy, so a repeat needs testing.
We measure the sensor circuit and compare it with the board's expectations.
If a repair would not be sensible for an older oven, we say so first.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Microwave codes

Feature Not Available or Fault DetectedWhirlpool Built-in Microwave Message "Feature Not Available": Retry or Cut Power LOCWhirlpool Microwave LOC on the Display: Control Lock Is On PFWhirlpool Over-the-range Microwave Showing PF: Power Failure Indicator Press Cancel to ResetWhirlpool Built-in Microwave Message "Press Cancel to Reset": Error Cleared by Cancel F8 E4Whirlpool Microwave Drawer Error Code F8 E4: Exhaust Air Temperature Sensor Probe or Insert ProbeWhirlpool Built-in Microwave Asking for "Insert Probe": Seat the Meat Probe F8E5Whirlpool Microwave Code F8E5: Exhaust Air Temperature Sensor PUSH or PSHWhirlpool Built-in Microwave Shows PUSH or PSH: Press Start

F4 E2F4 E2 questions

Why does my oven show F4 E2 and not F4 E1?

The brand lists the same areas for both codes and gives no separate meaning. We find out on the unit which circuit the control is reporting.

Is the microwave dangerous with F4 E2?

The brand gives no safety warning for it. Even so, a microwave that cannot trust its own sensor should not keep running, so stop using it if the code returns.

What should I tell you when I call?

Give us the model number if you can find it, say the code shows as F4 E2, and tell us whether the reset cleared it, even briefly.

Book a visit

Still seeing F4 E2?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 589-6107