JennAir Combination Wall Oven Code F1 E4: appliance manager or the microwave power relay

What F1 E4 means

On JennAir wall ovens that combine a conventional oven with a microwave, F1 E4 indicates a possible problem with the microwave appliance manager, the microwave power relay, or the associated wiring. The relay switches power to the microwave parts. You see the code on the display, and the microwave may not produce any heat. Owners often notice that food stays cold even though the timer counts down normally.

Common causes of F1 E4

Microwave power relay that no longer switches
Microwave appliance manager board not driving the relay
Wiring problem between the manager and the relay

✓ One safe check you can try

1. Clear the display with Cancel. 2. Reset power by turning the breaker off and on after a one-minute wait, giving the microwave relay a second try. 3. Place a cup of water in the microwave and run it for thirty seconds. 4. Listen for a normal click when it starts, but do not open any cover. 5. If the display shows F1 E4 once more, phone us and we will test the microwave relay.

! Why to stop there

A relay carries power to the microwave parts and should only be tested by someone trained for high voltage.
Whether the board or the relay has failed cannot be judged from the outside.
Running the microwave empty to test it 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.

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Other Wall Oven codes

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 Press Cancel to ResetJennAir Wall Oven Message "Press Cancel to Reset": Clear and power cycle Probe or Insert ProbeJennAir Wall Oven Display Probe or Insert Probe: Meat probe needed PUSH or PSHJennAir Wall Oven Display PUSH or PSH: Press start

F1 E4F1 E4 questions

Which is more likely, the relay or the manager board?

Either could be responsible, which is why the code names both. We test the relay output and the board signal to see which one has failed.

My microwave runs but is not hot. Is that F1 E4?

It could be related, because the relay controls power to the microwave. A technician must confirm, so give us the exact code and what the food did.

How is the repair priced?

We quote the price in writing before ordering anything. Parts and labor we complete are covered by a 30-day workmanship warranty. Relay and board costs are given in writing so you can decide before work.