Frigidaire Refrigerator Error Code rt

The rt code indicates a problem with the room temperature sensor, which monitors the ambient air temperature around the refrigerator. The fault means the sensor circuit is either shorted (producing 0V at the main PCB) or disconnected (producing 5V at the main PCB). The normal voltage range for this sensor is 0.5V to 4.5V. The code will persist until the sensor or its wiring is repaired or replaced.

The refrigerator may continue to run with the rt code active, but without accurate ambient temperature data, the control board cannot optimize cooling performance for your environment. Food safety could be affected if cooling becomes inconsistent over time. It is best to address the fault promptly rather than rely on the unit to maintain safe temperatures indefinitely.

A power reset may temporarily clear the rt code from the display, but the code will return if the underlying sensor fault is still present. The main PCB will re-detect the out-of-range voltage at the sensor input and log the fault again during normal operation. A permanent fix requires correcting the wiring connection or replacing the faulty sensor component.

A knowledgeable DIYer can start by checking whether the sensor connector has come loose, which requires no parts and no special tools beyond access to the sensor location. If the connector is secure, diagnosing the fault further requires a multimeter to measure voltage at the main PCB sensor input. Replacing the room temperature sensor is a straightforward part swap if the sensor is confirmed faulty, but working near the main PCB should be done with the refrigerator unplugged to avoid electrical hazards.

If the repair is just reseating a loose connector, there is no parts cost involved. Replacing a room temperature sensor typically costs between $15 and $60 for the part, depending on the specific model. If the main PCB is at fault, board replacement can range from $100 to $300 or more for the part alone. Adding professional labor costs generally brings the total repair into the $150 to $400 range depending on what needs to be replaced.