Amana Range Error Code F30

The F30 error code on an Amana range indicates that the RTD (Resistance Temperature Detector) sensor circuit is open. An RTD is the oven temperature sensor, a probe typically mounted inside the oven cavity that changes its electrical resistance in proportion to temperature. Under normal operating conditions, this sensor maintains a predictable resistance value that the control board reads to regulate oven heat. An open circuit means the control board is receiving no valid resistance signal at all, either because the sensor itself has failed internally or because the wiring between the sensor and the control board has been interrupted.

The most common hardware cause is a failed RTD sensor probe. These probes can develop internal breaks in their sensing element over time, especially after repeated heating and cooling cycles. Physical damage, such as a cracked probe tip from contact with oven racks or cookware, can also cause an open condition. Beyond the sensor itself, a broken wire, a loose connector, or corrosion at the harness terminals between the sensor and the control board can all produce the same open circuit reading.

Diagnosis should start at the sensor and its wiring before condemning the control board. Inspect the sensor probe visually for damage, then check continuity and resistance across the sensor terminals. If the sensor reads correctly and the wiring harness is intact with no broken or corroded connections, the electronic control board is the next suspect, as an internal failure on the board can falsely report an open RTD circuit even when the sensor is functioning properly.