The short answer
On this oven the code F3C reports that the cavity temperature thermistor and its wiring stopped answering with a value the control treats as plausible. The control stops the heat rather than work from a reading it cannot trust, so the cycle will not finish while the code stands.
The code table for this reading
Reference| Code | Documented meaning |
|---|---|
| F3C | There may be a problem with the Cavity Temperature Thermistor or the associated wiring. |
What an owner observes
- The code appears and the cycle stops heating — Everything else looks normal — lights, fan, display — and only the heat is missing.
- Temperature drifts, or the display disagrees with the food — A probe reading a few ohms off is still inside its window, so the cabinet runs cool or hot before the code ever latches.
- NEAR MISS - nothing heats and no code shows at all — That is a power or element fault rather than a reading fault, and it belongs on the page for that symptom.
Causes in the order they actually occur
- A loose or corroded connector at the thermistor — Ranked first because it is the failure that needs no part: the probe is fine, the joint carrying its signal is not, and heat cycling at the back of the cavity is what works a pin loose.
- Cavity temperature thermistor out of tolerance — Second: the element itself drifts or opens with age, and once it reads outside the accepted band the control has nothing to work from.
The order to work through it
- Power the machine down fully and see whether the code returns — Costs nothing and separates a latched one-off read from a live fault.
- Look at the connector at the thermistor before anything is measured — Seated, clean and tight is a five-second answer to the most likely cause.
The owner-safe sequence
- Clear the code with a full power-down — Switch the breaker off, let the control lose its stored state, then switch it back on and start a short cycle.
About 5 min
- Let the cavity reach room temperature before anything else — A hot resistance reading means nothing, and a hot cavity is the reason half of these codes cannot be diagnosed on the spot.
About 45 min
- STOP HERE if the next step is a meter across the probe terminals — That means a panel off and a connector back-probed, which is where an owner check ends and a service call begins.
The safety line on this appliance
Safety
Isolate the appliance first. Unplug it or switch off its breaker before removing any panel; a capacitor can hold a charge after the power is off.
When to stop and call someone
The free checks above come first; past them this is a visit. Call once the code survives a full power-down: a repeatable reading fault is a probe, a harness or a board, and telling those three apart needs a meter and the resistance table for that model line.
Codes read alongside this one
What this page does not cover
This reading is written for the model lines that use this probe on this cavity, and it stays with the code in its title. If a page exists for your exact family or model, that page is the more specific answer and it should be read first; the code index linked below is where those pages are listed.
The full code index for this appliance
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
