F4E5 has two named items: the microwave weight sensor and its wiring. A one-minute breaker reset is the listed step.
Model compatibility: JennAir reuses codes across series and model years, so F4E5 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 weight sensor, or the associated wiring.
Some microwaves use weight sensing to judge the food inside. F4E5 is the code JennAir gives for the Microwave Weight Sensor, and the wall oven and built-in microwave pages say the same thing.
What is listed
Only two items: the sensor and its wiring. Neither a control board nor a thermistor is part of this entry.
Steps to follow
At the breaker panel, switch off the appliance’s breaker(s).
Wait a whole minute.
Switch the breaker(s) on again.
Keep watching the display for a minute.
Confirm the oven operates.
While you test, keep the microwave floor clear of items. This is common sense and not a JennAir instruction.
If the code returns
JennAir’s listing ends at the reset, so the sensor and its wiring are for a technician.
Weight sensor questions
What does the sensor do? Generally, it senses how heavy the food in the cavity is. JennAir says no more than naming the code.
Is a heavy dish a cause? Not according to JennAir, which names the sensor and its wiring alone.
How long do I monitor after the reset? One minute.
There is no weight limit, sensor location, owner test or model condition in JennAir’s text.
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.
