Frigidaire Refrigerator F3 Error: Temperature Sensor Fault

Quick Answer

Frigidaire F3 is a temperature sensor fault. Frigidaire refrigerators typically have 2-3 temperature sensors: one in the fresh food section, one in the freezer, and sometimes one for the defrost system. F3 does not specify which sensor - enter diagnostic mode (hold Freezer + Fridge buttons 5 seconds) to check which zone shows an error reading.

When I see an F3 on a Frigidaire, the unit's basically flying blind. Without accurate data from the thermistors, the control board defaults to a timed run cycle, which means your milk might freeze or your ice cream turns into soup. It's a super common failure on the Electrolux-built platforms where moisture eventually wicks into the sensor housing and the internal resistor drifts or dies entirely.

FrigidaireRefrigeratorSeverity: moderateDifficulty: intermediate75% DIY Success

Time to Fix

15–120 min

Difficulty

intermediate

Parts Cost

$15 – $25

Tools Needed

Phillips #2 screwdriver, Small flathead screwdriver for prying connector clips

What Does the F3 Code Mean?

F3 sounds scary but it's usually just a $15-20 plastic sensor that's given up. The real challenge isn't the part itself, it's getting to it through all the shelving and back panels. I always check the wire harness connections first, because Frigidaire units can have loose pins at the plug that mimic a sensor failure perfectly. Reseated the connector on three of these last week and two of them cleared the code without touching the sensor at all.

Most Likely Causes

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

Fresh food sensor open circuit40%

Freezer sensor failed24%

Sensor wire broken14%

Defrost sensor failure12%

Sensor connector corroded10%

Symptoms You May Notice

F3 flashing on the display, sometimes alternating with the actual temperature reading so it looks like it's counting up or down
Your fresh food section is running way too cold, like 20 degrees, and you find frozen lettuce and cracked eggs when you open the door
Freezer feels soft and almost warm to the touch even though the compressor's running constantly, because the board's guessing at run times without any real sensor feedback
Compressor short cycling every few minutes instead of the normal 20-30 minute run cycle
Heavy uneven frost on one side of the freezer back wall while the other side stays completely clear

Can you reset a Frigidaire refrigerator to clear the F3 code?

After swapping the sensor, unplug the fridge for at least five minutes. Don't just flip the breaker on and off, actually let it sit so the control board resets fully. Plug it back in and watch the display. If F3 comes right back, the new sensor isn't seated properly in the connector or there's still a wiring issue somewhere between the sensor and the board.

Tools Required for Diagnosis

Phillips #2 screwdriverSmall flathead screwdriver for prying connector clipsDigital multimeter with ohms settingFlashlight or headlampSteamer or heat gun on low setting if evaporator is frozenElectrical contact cleaner sprayNeedle-nose pliers

Service / Diagnostic Mode

Hold the Freezer temp button and the Fridge temp button at the same time for 5 seconds. Don't just tap them, hold them down. The display shifts to show sensor readings. Look for OP (open circuit), SH (short), or a temperature that's obviously wrong like 150°F or -40°F.

Diagnostic Checklist

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

ComponentComponent Under Test

Expected Range9000–11000 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
Frigidaire Temperature Sensor5304513033 · $15–$25	5304513033	$15 – $25

Frequently Asked Questions

Can I run my Frigidaire fridge with F3?

Technically it'll still run, but I wouldn't trust it with anything you care about. When F3's active, the board's basically guessing at run times without real temperature feedback. I've seen fresh food sections drop to 20 degrees and freeze everything solid, and I've seen freezers climb to 40 degrees and ruin a whole chest of food. Short answer: move anything important to a cooler with ice and fix this sooner rather than later. It's not an emergency but don't wait a week either.

Which sensor is causing F3?

Enter diagnostic mode by holding both temp buttons for five seconds and look for OP or SH in the reading. In my experience, the fresh food sensor fails more often than the freezer sensor, probably because it sees way more temperature swings every time the door opens and humidity gets into the sensor body. The defrost thermistor is a less common culprit but worth checking if the first two test fine on the multimeter.

Can I use a non-Frigidaire sensor to save money?

I get why you'd want to. But here's the thing: Frigidaire uses 10K ohm NTC thermistors and the resistance curve matters a lot. If you put in a sensor with a different curve, even if the plug fits, the board won't interpret the readings correctly and you'll have the same temperature regulation problems you started with. Spend the $20 on the OEM part. Part number 5304491396 or 5304492396 covers a lot of the common models on the Electrolux platform.

How long does this repair take?

If you've already got the right part, plan on an hour to an hour and a half for the fresh food sensor. The freezer sensor takes longer because you're usually dealing with a frozen evaporator cover. If there's heavy ice buildup, add two to three hours of defrost time before you even start turning screws. I did four of these last month and the fastest was 45 minutes, the slowest was almost three hours because the evaporator was completely iced over and I had to wait it out.

My F3 code comes and goes. Is that still the sensor?

An intermittent F3 is actually a really strong sign that it's the connector, not a dead sensor. What's happening is the pin's making contact sometimes and losing it when the fridge vibrates or the metal expands and contracts from temperature changes. Clean the connector pins with electrical contact cleaner, reseat it firmly, and zip-tie the harness so it's not moving around. If that doesn't fix it, then yeah, test the sensor resistance and you'll probably find it's drifting out of range when it warms up slightly.

Related Frigidaire Refrigerator Error Codes

Code: HUBFrigidaire Refrigerator Error Codes Code: H1Frigidaire H1: High Temp Alarm

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 F3 Errors

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

FFSS2615TS, LFSS2612TF, FGHB2868TF, FFHD2250TS, FGSS2635TF, FFSC2323TS, LGHB2869TF, FFHS2622MS

Written by

Mike Sullivan

Lead Appliance Repair Technician · 20 years experience

Last verified for technical accuracy on March 15, 2026