KitchenAid Over-the-Range Microwave Code E12: gas sensor problem confirmed

What E12 means

KitchenAid over-the-range microwaves, such as the KMHS120ESS, KMHC319ESS or KHMS155LSS, display E12 when there is a problem with the gas sensor or its wiring. The wording is stronger than for E11, which only says there may be a problem. The recommended first step is a power reset, then watching the display for one minute to see if the code returns.

Common causes of E12

Gas sensor not working
Damaged or loose sensor wiring
A temporary error cleared by a reset

✓ One safe check you can try

1. Unplug the microwave, or turn its breaker off, for a minute. 2. Plug it back in and let the display start. 3. Watch it for a full minute to see whether E12 returns. 4. Try a timed one-minute run with a cup of water. 5. If the code comes back, call us.

! Why to stop there

The wording points at a real problem rather than a maybe, so testing is warranted
A technician checks the sensor and connections safely
You get a written price first and a 30-day warranty after

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 F6 E8KitchenAid Combination Microwave Code F6 E8: Manager control stopped responding FC E8KitchenAid Over-the-Range Microwave Code FC E8: Registration number entered wrongly F6 EAKitchenAid Built-In Microwave Code F6 EA: Interface control sensed over-temperature

E12E12 questions

Why watch the display for a minute?

A reset can clear an old message while the underlying condition remains. If E12 appears again within that minute, the problem is still there.

Is E12 related to my stove's gas?

No. The microwave's gas sensor reads cooking vapor. If you smell natural gas, leave and call the gas utility from outside.

Can I keep cooking with timed settings?

Often yes, because timed cooking does not use the sensor. Avoid auto-sensing programs.