KitchenAid Over-the-Range Microwave Code E23: heater or board alert

What E23 means

On KitchenAid over-the-range microwave hood combinations such as the KMHS120ESS or KMLS311HSS, E23 says there may be a problem with the heater, the appliance control board, or the associated wiring. The heater supports convection or browning on models that have it. If the heater or the board feeding it falters, the microwave posts E23 and may stop cooking.

Common causes of E23

Heater element or its circuit failing
Appliance control board not driving the heater
Wiring to the heater damaged

✓ One safe check you can try

1. Press Cancel and let the unit cool with the door open. 2. Unplug it for a minute and plug it in again. 3. Try a plain microwave run with a cup of water. 4. If the code returns when you try heating, stop and call us.

! Why to stop there

Heater circuits carry high current and need careful testing
Wrong guesses between heater and board add cost
We give the price in writing and back the work for 30 days

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

Probe or Insert ProbeKitchenAid Combination Microwave Message "Probe" or "Insert Probe": Seat the meat probe in its jack PUSH or PSHKitchenAid Built-In Microwave Message PUSH or PSH: The oven is waiting for Start Registration ErrorKitchenAid Over-the-Range Microwave Message "Registration Error": Check the home network and try again Sabbath, Sab, 5Ab, or 5A6KitchenAid Built-In Microwave Display Sabbath, Sab, 5Ab or 5A6: Sabbath Mode is on SEKitchenAid Over-the-Range Microwave Code SE: Keypad or user interface problem F4 E9KitchenAid Combination Microwave Code F4 E9: Microwave inverter output problem F9 or F9E0KitchenAid Built-In Microwave Code F9 or F9E0: Check the electrical connection after installation Press Cancel to ResetKitchenAid Built-In Microwave Message "Press Cancel to Reset": Clear it, then reset power if Call Service shows

E23E23 questions

Does every KitchenAid hood microwave have a heater?

Only some models include a convection or browning heater. If yours does not have one, the code still refers to the control's heating circuit, which a technician will check.

Will the fan and light work?

Often, because they run on separate circuits. Tell us what still works when you call.

Can I keep using microwave mode?

Sometimes. Because the code involves the board, we advise waiting for an inspection.