The short answer
In plain terms, F3 E8 means the reading arriving from the lower oven temperature sensor or the control and the wiring between them fell outside the band the control is built to trust. The control stops the heat rather than work from a reading it cannot trust, so the cycle will not finish while the code stands.
What this code is documented as meaning
Reference| Code | Documented meaning |
|---|---|
| F3 E8 | There may be a problem with the Lower Oven Temperature Sensor, the Control, or the associated wiring. |
Symptoms that travel with this code
- 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.
- The fault comes and goes with temperature — An intermittent connection opens as the metal expands and closes again when it cools, which is why the code often arrives part-way through a long cycle.
- 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.
What is usually behind it
- A loose or corroded connector at the sensor — 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.
- Lower oven temperature sensor 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 check order this code implies
- Only then treat the board as a candidate — Order matters because every check above is free and the board is not.
- Compare what the appliance claims against a separate thermometer — Ten minutes with an oven thermometer separates a drifting probe from a control that is being told the truth.
The owner-safe sequence
- Clear the code with a full power-down — A code that does not return was a single bad read.
About 5 min
- Run the shortest cycle the appliance offers and watch for the code — A short cycle that stays clean while a long one fails tells a technician the fault is thermal.
About 20 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.
Safety first, and it is not optional
Safety
Before any panel comes off: unplug the appliance or switch off its breaker, because a capacitor can hold a charge after the power is off. Nothing on this page asks you to work on a live circuit, and nothing on it asks you to alter a switch or an interlock - those are what keep the appliance safe when it is running.
Where an owner stops and a technician starts
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. Call straight away if you smell hot insulation or see discoloured wiring at the back — a connector hot enough to discolour is arcing, and that is a different and more urgent problem than the reading the code named.
Codes next to this one
The scope of this reading
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.
