KitchenAid Combination Oven Code F1 E3: the microwave appliance manager

What F1 E3 means

F1 E3 on KitchenAid combination microwave-wall ovens, including the KOCE500ESS and KOCE507ESS, says the microwave appliance manager or its wiring may have a problem. The microwave's coordinating board does not seem to be working properly. You see F1 E3 and the upper microwave cavity may not start, while the lower oven may still be fine. While the code shows, microwave settings may reset or ignore your input.

Common causes of F1 E3

Microwave appliance manager board failing
Loose or damaged wiring to the manager board
Power supply issue at the microwave side

✓ One safe check you can try

1. Press Cancel. 2. Turn off the breaker for a full minute, restore it, and check that the display wakes normally. 3. Try the microwave with a microwave-safe cup of water for thirty seconds. 4. If F1 E3 is back, do not run the microwave and call us.

! Why to stop there

Microwave boards hold high-voltage circuits nearby.
Only meter readings tell board from wiring.
A mistaken swap is expensive.

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

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F1 E3F1 E3 questions

Is F1 E3 the same as F1 E1?

No. E1 refers to the oven's appliance manager, while E3 refers to the microwave's. They are separate boards on a combination unit. You can look at the cavity floor and the door seal for spills, but anything inside the cabinet belongs to a technician.

Why does the microwave side fail first?

The microwave electronics work harder and with more heat than the lower oven's, so their boards can age differently. The microwave side runs many short, demanding cycles, and heat and use age its boards faster.

Is it a long repair?

Most manager board repairs are done in one visit when the part is available. Parts for popular combination ovens are usually easy for us to source.