JennAir Built-In Microwave Code F4 E1: microwave thermistor or its manager

What F4 E1 means

On JennAir built-in microwaves, drawers, and microwave cavities of combination wall ovens like the JMC8130DDS, F4 E1 means there may be a problem with the Microwave Sensor or Thermistor, the Microwave Appliance Manager, or the wiring. The sensor lets the unit watch conditions during microwave cooking. Owners see the code and the microwave function may be disabled even if other features still work.

Common causes of F4 E1

Microwave Sensor or Thermistor open or shorted
Microwave Appliance Manager misreading the sensor
Wiring on the sensor circuit damaged

✓ One safe check you can try

1. Cancel the cycle and leave the door open for a few minutes. 2. Switch the breaker off for one minute, then back on. 3. Heat a cup of water for thirty seconds to test the unit. 4. If F4 E1 returns, stop microwaving and call us. Do not use the microwave empty.

! Why to stop there

Running a microwave with a bad sensor can overheat the cavity.
The sensor and the manager control need individual testing.
Internal microwave parts hold dangerous voltage even when switched off.

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.

→Same appliance

Other Microwave codes

FC E7JennAir OTR Microwave Code FC E7: no connection to your router FC E8JennAir OTR Microwave Code FC E8: registration rejected, check the SAID number FCE8JennAir OTR Microwave Code FCE8: wrong appliance type or model chosen Flashing 0:00JennAir Countertop Microwave Message Flashing 0:00: Reset the Clock Flashing ":" or PF in displayJennAir OTR Microwave Message Flashing ":" or PF: Power Failure or Clock Off LOC or "L" or Padlock IconJennAir Microwave Message LOC, L or Padlock Icon: Control Lock Enabled Locked, Lock or LocJennAir Built-In Microwave Message "Locked, Lock or Loc": Control Lock On ":" or "." in displayJennAir Built-In Message ":" or "." in display: clock needs setting

F4 E1F4 E1 questions

What does the microwave sensor do?

It gives the Microwave Appliance Manager the temperature information it needs during cooking. If the reading is lost, F4 E1 appears and microwave cooking may stop.

Is the oven side of a combination unit affected?

The code concerns the microwave side. The oven section may still bake, but have the combination unit examined before relying on either side. Either way, avoid running either side until we have tested the sensor circuit.

Is there a charge just to diagnose F4 E1?

We quote the price in writing before work, including any diagnostic time. Repairs carry a 30-day workmanship warranty. We never begin repair work until you have seen and approved that figure.