F4E2 lists a microwave sensor/thermistor and the microwave appliance manager. A breaker reset is the single owner step.
Model compatibility: JennAir reuses codes across series and model years, so F4E2 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Possible problem with the microwave sensor/thermistor, the microwave appliance manager, or the associated wiring.
F4E2 on a JennAir oven with a microwave section means the fault could be in any of three places: the sensor/thermistor, the appliance manager (both of the microwave section), or the wiring joining them.
The three candidates
Sensor/thermistor: measures temperature (a general description).
Appliance manager: a circuit board that runs the microwave section (also a general description).
Wiring: the connections between the two.
JennAir’s wall oven page and its built-in microwave page repeat this wording. Both pages also carry F4E1, whose parts are almost identical.
What JennAir tells you to do
Cut power at the circuit breaker(s) and leave the oven off for a minute.
Restore power.
Stay by the oven for a minute to see if the code returns.
Verify operation.
Where the owner fix ends
JennAir gives no way of distinguishing the three, and none is described as an owner replacement. If the code stays, a technician is needed.
F4E2 compared with F4E1
The two are near neighbours without being the same. F4E1 speaks of a thermistor and an appliance manager, whereas F4E2 puts microwave in front of each. What the reset clears from memory is not stated; the instruction is simply to monitor for a minute after power returns.
JennAir supplies no sensor location, temperature limit, owner test or model condition here. Parts and reset make up everything.
See also
F4E1: thermistor and appliance manager, with slightly shorter wording
F1E4: pairs the microwave appliance manager with a power relay
Microwave-section wall oven repair in Los Angeles
If F4E2 is still showing once the reset is done, ring (310) 622-9465 and read out the code exactly as it appears on the display.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your JennAir appliance?
Book a specialist visit for a clear estimate and approval before any repair.
