Written by
Maya Ortiz 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.
F3C
Error codeF3C
ApplianceMicrowave
Quick answer
What F3C 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 F3C 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 Cavity Temperature Thermistor or the associated wiring.
Whirlpool describes F3C as a possible issue involving the Cavity Temperature Thermistor or the associated wiring. It is listed for over-the-range microwaves.
How to try clearing it
Step
What to do
1
First, the breaker goes off for a full one (1) minute.
2
Return the breaker to on.
3
Monitor the unit for one (1) minute; the code should not display again.
4
Verify that the microwave operates normally.
If the code returns, the manual suggests getting help from a qualified technician.
F3T4 – another code about the magnetron temperature thermistor.
Whirlpool microwave service in Los Angeles
Los Angeles owners can phone (310) 448-6692 about this microwave. Before calling, note F3C, the model number and the power reset you tried. The microwave repair page lists what is covered.
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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