JennAir Combination Wall Oven Code F1 E5: inverter or magnetron tube in the microwave

What F1 E5 means

On JennAir combination wall ovens F1 E5 means a possible problem with the microwave inverter, the magnetron tube, or the wiring. On the older JMW2430D series with Copernicus control, the same code points to the microwave inverter first, with the inverter board as the likely culprit, and then the magnetron. The microwave will not heat. Food placed in the microwave stays cool, though the light, fan and timer may still operate.

Common causes of F1 E5

Microwave inverter board that has failed
Magnetron tube that is no longer producing power
Wiring to the inverter or magnetron that is damaged

✓ One safe check you can try

1. Press Cancel to clear the display. 2. Turn the oven breaker off, count to sixty, and turn it on so the microwave inverter check starts fresh. 3. Test with a cup of water for twenty seconds only. 4. Do not run the microwave empty. 5. Still seeing F1 E5? Stop here and call for service on the microwave inverter.

! Why to stop there

The inverter and magnetron work at very high voltage, and the capacitors can hold a charge even after power is removed.
Replacing the magnetron before checking the inverter would be a costly guess.
Running a microwave with a damaged power circuit can create further damage.

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 Wall Oven codes

Sabbath, Sab, 5Ab, or 5A7JennAir Wall Oven Display Sabbath, Sab, 5Ab or 5A7: Sabbath mode is on FC E6JennAir Wall Oven Code FC E6: Wi-Fi power module FC E7JennAir Wall Oven Code FC E7: Oven did not connect to router FC E8JennAir Wall Oven Code FC E8: Registration error FC E9JennAir Wall Oven Code FC E9: Wi-Fi power module wiring Feature Not AvailableJennAir Wall Oven Message "Feature Not Available": Follow the Prompt on the Display Flashing Time, Clock, 12:00, Power Loss or Enter TimeJennAir Wall Oven Display Flashing Time or 12:00: Set the clock after power loss Locked, Lock or LocJennAir Wall Oven Display Locked, Lock or Loc: Controls and door are locked

F1 E5F1 E5 questions

Is F1 E5 the inverter or the magnetron?

Both are named. On the JMW2430D generation the inverter board is the first suspect and the magnetron follows. A test of each tells us which one to replace.

Is it safe to use the microwave side?

We suggest waiting. The code involves high-voltage parts, and the microwave will not heat properly anyway. The conventional oven may still work. Doing it in the right order saves you from paying for parts that were healthy.

Will you quote before replacing the inverter?

Yes. We give a written price after diagnosis, then complete the repair with a 30-day workmanship warranty. Written quote first, then the repair, then the warranty on our work.