Frigidaire Range Error Code LEDs 4+6

LEDs 4+6 on a Frigidaire range indicates the control board has detected a potential runaway oven condition, meaning the oven may be heating without proper regulation or control. The two most common causes are a failed RTD temperature sensor probe inside the oven cavity and a shorted relay on the control board. This is a safety-related code that should be addressed before using the oven again.

Disconnecting power may temporarily clear the code, but if the underlying cause is not repaired the error will return. More importantly, if a relay on the control board is shorted, the oven may resume overheating as soon as power is restored. A reset alone is not a fix and the root cause must be identified and corrected.

Repair costs depend on which component has failed. An RTD sensor probe is generally the less expensive fix, with parts typically ranging from around 20 dollars to 60 dollars plus labor if a technician is involved. A replacement control board is more costly, with parts often ranging from 150 dollars to 350 dollars or more depending on the specific model, plus labor costs. Getting a professional diagnostic first can help avoid replacing parts unnecessarily.

No, you should not use the oven while this code is active. The LEDs 4+6 code is a runaway oven warning, which means there is a possibility the oven could overheat to unsafe temperatures. If the oven is already overheating, disconnect power to the range immediately and do not restore it until the fault has been diagnosed and repaired.

Start by inspecting the RTD sensor probe and its wiring inside the oven cavity for damage, and replace the probe if it appears faulty or tests outside its rated resistance specification. If the oven is actively overheating, disconnect power immediately. After restoring power, if overheating continues with a known-good probe installed, the control board will need to be replaced due to a shorted relay. A qualified technician can test both components to confirm which part has failed.