F10 on a Frigidaire oven (also common on Kenmore-badged Frigidaire) is a runaway-temperature alarm — the control read a temperature that was too high or out of range and shut the oven off to protect it. That's a safety trip, not always a broken part, but it needs to be pinned down before you keep cooking with it. Here's how a tech works it.
The #1 cause. The oven sensor tells the control the real temperature; when it drifts out of spec or shorts, the control reads a false high temp and trips F10.
Check it: With the oven cool and unplugged, a tech checks the sensor's resistance (about 1080 ohms at room temperature). Off-spec = replace the sensor, an affordable common part.
A momentary glitch can trip a one-off F10.
Check it: Unplug the range (or flip its breaker) for 5 minutes and restore power. If F10 stays gone through a normal bake, it was a glitch. If it returns, move to the sensor.
The next cause: a relay on the electronic oven control sticks, so the element stays powered and the temperature truly runs away.
Check it: If the sensor is in spec but F10 returns, a tech tests the oven control board (EOC) — a stuck bake/broil relay is the classic finding.
A pinched or corroded wire between the sensor and the control mimics a bad sensor.
Check it: A tech inspects the sensor harness at the back of the oven during the sensor check.
Usually repair — an oven sensor is an inexpensive, common part with flat labor. Even a control board (EOC) is well below a new range on most models. Because F10 is a safety trip, get it diagnosed rather than ignored.
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First reset it — unplug the range (or flip the breaker) for 5 minutes and restore power. If F10 comes back, the most common fix is the oven temperature sensor (RTD), which reads out of spec; next is a stuck relay on the oven control board. Both are affordable, common repairs — but stop using the oven until it's diagnosed since F10 is a runaway-temp safety trip.
No — F10 means the control shut the oven off because it saw a runaway temperature. Leave it off until a tech confirms whether it's just the sensor or a stuck relay that could keep the element powered.
It's a runaway-temperature error: the control read a too-high or out-of-range temperature and shut the oven down to protect it. Usually a drifted oven sensor; sometimes a stuck control relay.