How to Replace Frigidaire Oven Temperature Sensor
If a Frigidaire oven shows F30 or F31, will not heat, or bakes well off the set temperature, the RTD temperature sensor is the usual cause. It is a beginner-level swap: one or two screws inside the cavity and a two-wire plug behind the wall, done in under fifteen minutes. Worth confirming before the oven carries a…
What the sensor does and how it fails#
The RTD (resistance temperature detector) is a thin metal rod in the upper-rear corner of the cavity that reports air temperature to the control board so it can cycle the elements. When it opens, the board reads F30; when it shorts, F31. A drifting sensor throws no code but leaves the oven running hot or cold. The part is identical across Frigidaire and Electrolux ranges of the same generation.
Confirm it with the resistance table#
Clear the code with CANCEL and reheat to 350°F — if F30 or F31 returns within five minutes, the sensor is confirmed. Better still, disconnect it and meter the two terminals against the specification: about 1,080-1,100 ohms at a 70°F room, roughly 1,300-1,350 ohms at 250°F, and around 1,450-1,500 ohms at 350°F. Zero ohms is a short, an open reading is a break, and anything more than 50 ohms off the table means the sensor has drifted.
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Swap the sensor#
- Switch off the range breaker and let the cavity cool.
- Remove the one or two Phillips screws holding the sensor bracket to the rear wall.
- Draw the rod forward until the connector clears the wall; on Gallery models you can also reach it behind the rear panel with a Torx T15.
- Press the release tab and unplug the old sensor, then feed the new one's wire back through the wall.
- Seat the bracket on the original holes so the rod hangs 3-4 inches into the cavity, clear of the racks and walls.
Test and calibrate#
Restore power, clear any codes, and set 350°F. After a full twenty-minute preheat, a separate oven thermometer should land within about 25°F. If it runs consistently high or low, hold BAKE for five seconds to reach the offset and adjust in 5°F steps. A sensor that reports air temperature must never touch a rack or the wall, or it reads the metal instead of the air and calibration chases a moving target.
Frigidaire [oven repair](/bay-area/services/oven-repair) in Sacramento and the Bay Area — our technicians carry RTD sensors and verify calibration on site. Book a same-day visit.
Senior Gas Appliance Specialist · 18 years experience
AGA-certified gas appliance specialist with 18 years of experience in residential and commercial oven, range, and cooktop repairs.
