JennAir Built-In Code F4 E5: microwave weight sensor

What F4 E5 means

JennAir built-in microwaves, microwave drawers and the microwave cavity of combination wall ovens, such as the JMC2430LL and JMC2430DS, show F4 E5 when the microwave weight sensor or its wiring may have a problem. The weight sensor helps auto-weight programs decide how long to cook. You may see F4 E5 and find that those programs will not run. Manual time and power cooking is normally unaffected, so only the auto-weight programs stop working.

Common causes of F4 E5

Weight sensor has failed or lost calibration
Wiring or connector to the weight sensor is loose
Turntable or tray is resting wrongly and confusing the reading

✓ One safe check you can try

1. Cancel any cycle and open the door. 2. Take out the turntable and tray, check that nothing is stuck beneath, and put them back correctly. 3. Try again with an empty cavity. 4. Use manual time and power meanwhile. 5. If F4 E5 stays, call us.

! Why to stop there

Weight sensing parts sit under the cavity floor, where drawers and built-in cutouts make access difficult.
A wrong calibration cannot be set from the keypad.
Tipping or sliding the unit without help can damage it.

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

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 F8 E3JennAir Built-In Microwave Code F8 E3: one more cooling alert Sabbath, Sab, 5Ab, or 5A6JennAir Built-In Microwave Message "Sabbath, Sab, 5Ab, or 5A6": Sabbath Mode On F8 E4JennAir Built-In Microwave Code F8 E4: exhaust air sensor SEJennAir JMV Code SE: keypad problem F8E5JennAir JMV Code F8E5: exhaust air temperature sensor

F4 E5F4 E5 questions

Does F4 E5 mean my food weighs too much?

Not necessarily. Heavy dishes can strain a sensor, but the code refers to the sensor or its wiring. First check the turntable seating, then try a lighter dish.

Can I still use time cook?

Yes. Manual time and power do not rely on the weight reading, so you can keep using the microwave while you wait for a repair. Just avoid the automatic weight programs, which will keep showing the code.

Which programs rely on the weight sensor?

Auto programs that ask you to enter a food weight rely on it. Those are the ones that refuse to run while F4 E5 is active. Time-and-power cooking and manual reheating are not affected.