How to Replace the Oven Temperature Sensor (RTD Probe) in a Frigidaire Range

The oven temperature sensor (also called an RTD probe or resistance temperature detector) is a thin metal rod mounted in the upper rear wall of the Frigidaire oven cavity. It continuously reports cavity temperature to the control board, which uses this data to cycle the heating elements (or gas burner) to maintain the set temperature. When this sensor fails, the oven may display F30 or F31 error codes, fail to heat entirely, overheat dangerously, or cook unevenly because the control board is receiving incorrect temperature data.

This is one of the most common Frigidaire oven repairs and one of the simplest. The sensor is held by 1-2 screws inside the oven and connects via a 2-wire plug behind the rear panel. Replacement takes under 15 minutes and immediately restores proper temperature control. The part is identical across Frigidaire and Electrolux ranges of the same generation.

Before You Start

• Tools needed: Phillips #2 screwdriver, multimeter, Torx T15 (if accessing from rear panel on Gallery models)
• Parts needed: Oven temperature sensor (~$20-$40, Frigidaire common: 316490000, 316490001, or model-specific)
• Time required: 10-15 minutes
• Difficulty: Beginner
• Safety warning: Turn off the circuit breaker for the range. Allow the oven to cool completely. The sensor itself is low-voltage (the control board sends milliamps through it for resistance measurement), but the rear panel provides access to 240V wiring. On gas ranges, also close the gas shut-off valve before accessing the rear panel area.

Step-by-Step Instructions

Step 1: Confirm the Sensor is the Problem

Before replacing, verify the sensor has actually failed:

• Error codes F30 (sensor open) or F31 (sensor shorted): These directly indicate sensor failure. Clear the code by pressing CANCEL, then turn the oven to BAKE 350F. If the code returns within 5 minutes, the sensor is confirmed failed.
• Oven temperature inaccuracy: Place a standalone oven thermometer in the center rack. Set oven to 350F. If the thermometer reads more than 50F different from the set temperature after full preheat (20 minutes), the sensor may have drifted.
• Test the sensor directly: At room temperature (70F), the sensor should read approximately 1080-1100 ohms between its two terminals. At 250F, approximately 1300-1350 ohms. At 350F, approximately 1450-1500 ohms. A reading of 0 ohms = short (F31). Infinite = open (F30).

Step 2: Locate the Sensor Inside the Oven

The temperature sensor is a thin metal rod (approximately 3-4 inches long, 1/4 inch diameter) protruding from the upper rear wall of the oven cavity, usually in the upper left or upper right corner. It has a small mounting bracket held by 1-2 Phillips screws. The rod extends about 3 inches into the cavity. Behind the cavity wall, a wire connector joins the sensor to the control board wiring.

Step 3: Remove the Old Sensor from Inside the Oven

Remove the 1-2 Phillips screws holding the sensor mounting bracket to the rear oven wall. Gently pull the sensor forward and out of the wall. The sensor rod slides through a hole in the rear cavity panel. As you pull forward, you will feel resistance from the wire connector behind the wall. Do not yank — just note that the connector is back there.

Step 4: Disconnect the Wire Connector

You have two options for accessing the connector:

Option A (through the oven cavity): Pull the sensor forward enough that the wire and connector come partway through the rear wall hole. Disconnect the plug by pressing its release tab and pulling apart. Feed the old sensor and its wire out through the front.

Option B (from behind the range): Pull the range from the wall. Remove the rear access panel (4-6 screws). Locate the connector where the sensor wires meet the control board harness (typically a 2-pin white connector). Disconnect here and pull the old sensor and wire out from the rear.

Step 5: Install the New Sensor

Feed the new sensor's wire through the rear wall hole from inside the oven cavity. Push the sensor rod through the hole until the mounting bracket sits flush against the rear wall. Connect the wire plug (it only fits one way). From inside the oven, install the mounting screws to secure the bracket. Verify the sensor rod extends 3-4 inches into the cavity and is not touching oven racks or the rear wall interior.

Step 6: Test and Calibrate

Restore power at the breaker. Set the oven to BAKE 350F. Clear any existing error codes by pressing CANCEL. The oven should preheat without error codes returning. After 20 minutes, verify with your oven thermometer that the cavity temperature is within 25F of the set point. If the oven runs consistently high or low by more than 25F, use the calibration offset:

Gallery/Professional (electronic): Press and hold BAKE for 5 seconds. Display shows current offset. Use UP/DOWN arrows to adjust in 5F increments (+/- 35F max). Press START to save.

Basic (mechanical thermostat): These models use the sensor differently — the calibration screw is behind the temperature knob.

Sensor Resistance Values at Temperature

If your reading differs by more than 50 ohms from these values at any temperature, the sensor has drifted and should be replaced even without an error code.

Frigidaire Oven Error Codes Related to Temperature Sensor

Troubleshooting After Sensor Replacement

• F30/F31 code returns immediately with new sensor: Check the wire connector — it may not be fully seated. Also inspect the wire for damage (pinched, cut, or melted from oven heat). On rare occasions, the control board input circuit has failed
• Oven temperature is accurate but slow to preheat: Normal if the old sensor was reading low (making the oven think it was hotter than actual). The control board now receives accurate data and cycles correctly
• Temperature swings widely (cycles between too hot and too cold): The control board's PID parameters may need to readapt to the new sensor. Run 3-4 full bake cycles; the adaptive algorithm should settle
• Oven works but displays wrong temperature: The display reads the sensor value. If a different thermometer disagrees, calibrate using the offset procedure in Step 6

When to Call a Professional

Contact a professional if:

• Error codes persist after sensor replacement (control board failure)
• The oven overheats to dangerous temperatures (control board relay stuck closed — safety hazard)
• The sensor wire behind the rear wall is damaged and needs replacement along the full run to the control board
• Your model has a dual-sensor system (main + convection probe) and both show errors
• Gas range models where the sensor issue may be masking a gas valve or igniter problem

Cost Comparison: DIY vs Professional

Need Professional Help?

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FAQ

Q: What does error code F30 mean on my Frigidaire oven? A: F30 means the control board detects an open circuit in the temperature sensor (infinite resistance). The most common cause is a broken sensor element or disconnected wire. Replacing the sensor resolves this in approximately 90% of cases.

Q: How do I test my Frigidaire oven temperature sensor? A: Disconnect the sensor and measure resistance with a multimeter. At room temperature (70F), it should read 1080-1100 ohms. Zero ohms = shorted. Infinite = open. Either extreme requires replacement.

Q: Will my Frigidaire oven work without a temperature sensor? A: No. The control board requires sensor feedback to operate the heating elements. Without a functioning sensor (open or shorted), the board will display an error code and refuse to activate the elements as a safety measure.

Q: Do I need to recalibrate after replacing the Frigidaire oven sensor? A: The factory calibration is zero offset by default, which is correct for a new sensor. Only adjust the calibration if your oven thermometer shows consistent deviation after 3-4 preheat cycles with the new sensor installed.

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