Frigidaire Oven Error Code F3

F3 on a Frigidaire oven indicates a problem in the RTD temperature sensor probe circuit. Sub-code F30 means the probe or wiring is shorted, while F31 means the probe or wiring has an open condition. The code can also appear when the safety thermostat trips or the cooling fan stalls. In all cases, the control board is unable to read a valid oven temperature.

You should not continue using the oven while F3 is active. The error means the control board cannot reliably monitor the oven's temperature, which removes a critical safety layer. Without accurate temperature feedback, the oven could overheat or fail to heat properly, posing both a fire hazard and a risk of improperly cooked food.

Repair costs vary depending on the root cause. An RTD temperature sensor probe typically costs between $20 and $60 for the part, and replacing it yourself keeps the total cost low. If a technician is needed, labor charges generally range from $80 to $150 depending on your area. Repairs involving the safety thermostat or cooling fan motor may push the total higher, roughly $100 to $250 or more with professional service.

Many homeowners and DIYers can resolve F3 by first pressing the CLEAR key to reset the fault, then inspecting the wiring connected to the RTD probe for loose or damaged connections. Testing the RTD probe resistance with a basic multimeter and comparing it to the probe resistance chart is the next step. If the probe is out of range, replacing it is a relatively straightforward repair. If the fault points to a stalled cooling fan or tripped safety thermostat, those components require more thorough testing before replacement.

Pressing the CLEAR key is the recommended first step and may temporarily clear the display, but the code will return if the underlying fault is still present. A reset is useful for confirming whether the fault is intermittent or persistent. If F3 reappears after the reset, the probe, wiring, safety thermostat, or cooling fan must be diagnosed and repaired before the oven will operate normally.