KitchenAid Over-the-Range Microwave Code F3T1: user interface thermistor

What F3T1 means

On KitchenAid over-the-range microwaves such as the KMHS120ESS or KHMS155LSS, F3T1 points to the user interface thermistor, or the wiring to it. This thermistor monitors the temperature near the control panel. If its reading disappears, the control may shut down cooking and show the code to protect the electronics.

Common causes of F3T1

User interface thermistor failing
Thermistor wiring loose
Control not reading the thermistor

✓ One safe check you can try

1. Press Cancel and let the microwave rest for ten minutes. 2. Make sure the area above the stove is not trapping heat. 3. Unplug the microwave for a minute. 4. Reconnect and test with a cup of water. 5. If F3T1 returns, call us.

! Why to stop there

The sensor sits behind the control panel, close to live parts
We test for a bad part rather than guess
Price in writing first, 30-day workmanship 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

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 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 F4E9KitchenAid Over-the-Range Microwave Code F4E9: Smart Pop control or wiring flagged FC E1KitchenAid Over-the-Range Microwave Code FC E1: Wi-Fi link timed out F6KitchenAid Over-the-Range Microwave Code F6: Relay control board

F3T1F3T1 questions

Why is there a thermistor near the keypad?

The control electronics are heat sensitive, so the oven watches their temperature. F3T1 says that reading may be wrong.

Does stove heat matter for F3T1?

Constant heat rising from the range can stress the area. Use the range vent and avoid blocking it.

Which thermistor does F3T1 mean compared with F3T2?

Each F3T code names a different thermistor. F3T1 is the control side, and F3T2 is convection.