Frigidaire Refrigerator Error Code r1

The r1 code indicates that the main control board has detected a disconnection or short circuit in the refrigerator compartment temperature sensor circuit. The board cannot receive a valid temperature reading from the sensor, which is required for proper cooling regulation. A technician diagnoses this by measuring the resistance at the sensor connector on the main PCB and replacing the sensor if an open or short is confirmed.

Operating the refrigerator with an active r1 code is not recommended for extended periods. Without a functioning temperature sensor, the control board cannot accurately regulate cooling, which means the compartment may run too warm or too cold. Food safety can be compromised if temperatures are not maintained correctly.

A power reset may temporarily clear the r1 code from the display, but the fault will return if the underlying sensor disconnection or short circuit is still present. The code indicates a hardware fault in the sensor circuit, not a software glitch, so a reset alone does not resolve the problem. The sensor resistance must be tested and the defective component replaced before the code will clear permanently.

A knowledgeable DIYer can start by checking that the sensor connector at the main PCB is fully seated and free of visible corrosion or damage. If the connector appears secure, diagnosing the fault further requires a multimeter to measure sensor resistance, which involves accessing the main PCB. Replacing the sensor is a moderately involved repair, as the thermistor is typically located inside the refrigerator compartment and connected through the cabinet to the control board.

If only the refrigerator thermistor sensor needs replacement, parts typically range from around $20 to $60 depending on the model. Professional labor to diagnose and replace the sensor can add $80 to $200 or more. If the main PCB is at fault instead, the control board itself is significantly more expensive, often ranging from $150 to $350 or higher for the part alone.