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Whirlpool Microwave F3T4 Error Code

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Maya Ortiz Written by Maya Ortiz Appliance Repair Content Specialist Published October 20, 2026

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Code overview at a glance.

The facts for this Whirlpool error, a plain-language snapshot, and what to confirm against your model number.

Error code F3T4
Appliance Microwave
Quick answer

What F3T4 means on a Whirlpool over-the-range microwave and how to try a power reset.

Model note: Whirlpool reuses codes across series and model years, so F3T4 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.

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What this code may mean.

A plain-language reading of the code — always confirm against your model’s documentation.

There may be a problem with the Magnetron Temperature Thermistor or the associated wiring.

Seeing F3T4? Whirlpool’s product help lists it as a possible trouble spot at the Magnetron Temperature Thermistor or the associated wiring. Over-the-range microwaves are the models it refers to.

Try this first

Step What to do
1 Turn the circuit breaker to off; one (1) minute later you can continue.
2 After the wait, turn power back on at the breaker.
3 Observe the microwave for one (1) minute and note whether the error comes back.
4 Finally, check that the microwave operates.

Hand the microwave to a qualified technician if the same code appears again.

Easily confused codes

  • F3T3 deals with the hood temperature thermistor; easy to mix up with this one.
  • F3T1 is worth comparing, since it concerns the user interface thermistor.
  • F6 relates to the relay control board as well.

Service for your Whirlpool microwave

Call (310) 448-6692 for Whirlpool microwave repair in Los Angeles. Tell us the error code, the model number and any steps already taken, and read more about microwave repair on the site.

Source: Whirlpool Product Help: F3T4 – Error Code – Over-the-Range Microwave

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Safety warning before you continue.

Stop immediately if you notice smoke, sparks, a burning smell, gas odor, or water near electrical parts.

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.

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Seeing this code on your appliance?

Book an Whirlpool appliance service visit for a clear estimate and approval before any repair.

Experienced technicians, clear diagnostics, and workmanship coverage on completed repairs.

Book a Repair (310) 448-6692

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Ready to restore your Whirlpool appliance?

Book a repair online or call us — clear estimates, approval before any work, and a workmanship warranty on completed repairs.

Book a Repair (310) 448-6692

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Tell us what’s wrong — we’ll take it from there.

Share a few details and we’ll confirm an appointment. Prefer to talk? Call us and we’ll help right away.

Prefer to call? (310) 448-6692
  1. Share the symptom Tell us the Whirlpool model and what’s going wrong.
  2. Confirm a window We’ll schedule a visit that fits your day.
  3. Approve before work You get a clear estimate — nothing starts without your OK.
Phone (310) 448-6692
Email info@whirlpoollosangeles.support
Hours Mon–Sat: 8:00 AM – 7:00 PM
Service area Serving Los Angeles County and Orange County.
Response time Appointment timing depends on ZIP code, route capacity, and appliance type.
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