Error code · Microwave

F3T1 on a Whirlpool Over-the-Range Microwave: User Interface Thermistor

Medium · inspection needed

Code: F3T1
Appliance: Microwave
Brand: Whirlpool
Warranty: 30-day workmanship

What F3T1 means

F3T1 on a Whirlpool over-the-range microwave, such as model WMH31017HS, WMH32519HZ or WMH53521HZ, refers to the user interface thermistor and the wiring around it. This is a temperature sensor in the control panel area. The display shows F3T1. The brand's only step is a power reset and it names no failed part, so we read the code as a panel temperature sensor circuit to be tested.

Common causes of F3T1

User interface thermistor
Wiring and connector in the panel circuit
Control board reading the thermistor

✓ One safe check you can try

1. Switch the breaker for this microwave to off and leave it for a minute. 2. Switch it back on. 3. Look at the front panel for F3T1 over a minute. 4. If the display is clear, start a short cycle and make sure the keys respond. 5. If F3T1 reappears, stop and call us.

! Why to stop there

A reset does not reveal whether the thermistor, wiring or control is the cause.
We start with the thermistor's connection at the panel and then check the control.
We explain the result in plain words and quote in writing.

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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F3T1F3T1 questions

What does F3T1 mean?

The control sees a problem with the thermistor in the user interface area or the wiring that connects it. It is a temperature sensor circuit code.

Is F3T1 the same as F2E1?

No. F2E1 points to the keypad and its wiring, while F3T1 names the user interface thermistor. Each has its own check on over-the-range models, so the two codes are not interchangeable.

Can I clear F3T1 permanently?

The reset clears the display, but if the cause is still there the code will return. A returning F3T1 needs a test, and we can do that at your home.

Book a visit

Still seeing F3T1?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 589-6107