Written by
Daniel Reeves Appliance Repair Content SpecialistPublished October 20, 2026
Whirlpool®
Code overviewat a glance.
The facts for this Whirlpool error, a plain-language snapshot, and what to confirm against your model number.
F3T1
Error codeF3T1
ApplianceMicrowave
Content status
Verified
Quick answer
Meaning of F3T1 and the reset sequence for Whirlpool over-the-range microwaves.
Model note: Whirlpool reuses codes across series and model years, so F3T1 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Whirlpool®
What this codemay mean.
A plain-language reading of the code — always confirm against your model’s documentation.
Mean
There may be a problem with the User Interface Thermistor or the associated wiring.
F3T1 – what it means: the microwave may have trouble with the user interface thermistor or its wiring.
The entry covers over-the-range units.
Before anything else
Turn the supply off for one (1) minute, by breaker or by plug.
Turn the breaker back on next.
Allow one (1) minute of observation to confirm the code stays off the screen.
Confirm that normal operation is back.
If it comes back: Technician help, from a qualified technician, is the step after an unsuccessful reset.
Compare with
F3T3 covers the hood temperature thermistor. Also see F3C (the cavity temperature thermistor). F4E1 is close by and is about the cavity temperature thermistor.
Whirlpool microwave repair near you
Service for this microwave covers the Miami, New York, Houston, Los Angeles and San Diego metro areas. Ring (844) 968-2053, and say which code showed up, what the model number is and whether the reset changed anything. Cooking appliances: oven service.
Stop immediately if you notice smoke, sparks, a burning smell, gas odor, or water near electrical parts.
Safe
Important
Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Whirlpool®
Seeing this codeon your appliance?
Book an Whirlpool appliance service visit for a clear estimate and approval before any repair.
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