Frigidaire Oven F31 Error Code: Lower Oven Sensor Fault

Quick Answer

Frigidaire F31 is a double-oven specific code found on models like the FGEW276SPF and other two-cavity ranges. The lower oven RTD probe is a separate sensor from the upper oven probe (F3 covers the upper probe). On double oven models, the lower probe runs a longer wiring harness to the shared control board, making the wiring path more susceptible to pinch damage during installation or service.

I usually see this code right after a self-clean cycle or when the oven was moved for a kitchen remodel. Your upper oven's still fine, but F31 kills the lower oven functions to stop a runaway heat situation. It's almost always a resistance problem in the lower RTD sensor, but don't ignore the chance that a mouse chewed through that long wire harness running along the bottom of the unit.

FrigidaireOvenSeverity: moderate88% DIY Success

Time to Fix

25–60 min

Difficulty

beginner

Parts Cost

$18 – $35

Tools Needed

Phillips #2 screwdriver, Digital multimeter (set to ohms)

What Does the F31 Code Mean?

Think of the RTD as the oven's thermometer. On these Frigidaire double units, the lower cavity has its own dedicated sensor, totally separate from the upper one. If that sensor sends back a noisy or impossible temperature reading, the board throws F31. Honestly, if your multimeter shows anything other than roughly 1,100 ohms at room temp, that sensor's failed and it needs to go.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Lower oven RTD probe internal wire break40%

Lower probe wiring harness pinched during installation or service24%

Oven cleaner contact with lower probe body22%

Probe connector corroded or disconnected at the control board14%

Symptoms You May Notice

F31 flashes on the control panel and won't clear even after you cut power at the breaker and restore it.
Lower oven sits completely cold no matter what temperature you dial in, preheat indicator never moves off zero.
Lower oven temperature display shows dashes or error characters where the actual temp readout should be.
Upper oven heats up perfectly fine, which is honestly a great clue that the control board itself is probably OK.
Sometimes you'll catch it early when the lower cavity takes way longer than usual to preheat before the code finally locks in permanently.

Can you reset a Frigidaire oven to clear the F31 code?

Once you swap the sensor, most Frigidaire boards clear F31 automatically when they see the new probe reading correctly. If it's still showing after you replace the part, flip the double-pole breaker in your panel for a full 60 seconds. Don't just flip it and flip it right back. Wait the full minute. That clears the control board's memory and makes it re-read the resistance on the fresh probe from scratch.

Tools Required for Diagnosis

Phillips #2 screwdriverDigital multimeter (set to ohms)Flashlight or headlampWork glovesAppliance dolly or furniture sliders (if pulling unit out)

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

ComponentComponent Under Test

Expected Range1080–1120 ohms

ConditionIf Open (OL) or infinite, replace component.

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
RTD Temperature Probe (Lower)316217002 · $18–$35	316217002	$18 – $35

Frequently Asked Questions

What's the difference between Frigidaire F31 and F30?

Technically, F30 usually means the wire's physically snapped or unplugged from the probe entirely, while F31 means the sensor's drifted out of its acceptable resistance range. That drift happens when the probe ages and the internal wire starts breaking down from years of heat stress. Either way you'll probably end up replacing the probe. The diagnostic process is the same: check resistance first, and if it's not around 1,100 ohms, that probe's getting swapped regardless of which code showed up.

Can I still use the upper oven cavity while F31 is showing?

Yeah, you can keep cooking in the top oven without any worries. The control board handles the two cavities independently, so F31 being isolated to the lower sensor circuit means the upper probe's still feeding the board good data and everything up top works normally. One thing though: don't run a self-clean cycle on the upper oven until the lower issue's fixed. The extreme heat during self-clean sometimes trips secondary errors on the shared board, and that just complicates your diagnosis.

Is this an expensive repair?

Honestly, this is one of the cheaper Frigidaire repairs you'll run into. The probe, part 316217002, runs about $25-40 depending on where you order it. Two screws and maybe 15 minutes of your time. The only thing that drives up cost is if the harness is pinched behind the unit, because then you're looking at more time to access and repair it. If you're calling a tech, expect $150-250 for the visit plus parts. But if you can use a screwdriver and a cheap multimeter, you can handle this yourself no problem.

How do I know if it's the probe or the control board causing F31?

This is exactly where a multimeter pays for itself. If you disconnect the probe and it reads correctly at 1,100 ohms, and the wiring harness looks clean all the way back to the board, then yeah, the board's sensor input circuit might be the issue. But bad boards for F31 specifically are pretty rare. I'd say 90% of the time it's the probe or the harness, not the board. Rule those out completely first before you spend $150-200 on a control board, because a new board won't fix a bad probe.

Will F31 clear on its own if I just wait it out?

No. It won't clear by itself because the control board keeps checking that sensor circuit every single time you try to use the lower oven. It'll throw F31 every time until the resistance reading comes back in range. Cutting power at the breaker clears it temporarily, and your lower oven might even work for a minute if the connection's intermittent, but the code comes right back. Don't ignore it hoping it disappears on its own, because the board disables the lower element specifically to prevent a runaway heating situation.

Related Frigidaire Oven Error Codes

Code: HUBFrigidaire Oven Error Codes: Complete F and E Code Reference Code: F3Frigidaire Oven F3 Error Code: Open Temperature Sensor Code: F30Frigidaire Oven F30 Error Code: Lower Oven Sensor Open

Same Fix Works on These Brands

Frigidaire shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience F31 Errors

This repair applies to most Frigidaire ovens with this error code. Common model numbers include:

FGEW276SPF, FGEW276SPB, FGEW276SPW, FGEW2765PF, FPEW2785PF, FGEW3065PF, FFEW2726TS

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 14, 2026