Frigidaire Refrigerator Error Code R-DEFROSTING ERROR

The R-DEFROSTING ERROR on a Frigidaire refrigerator indicates a fault in the refrigerator compartment defrost circuit. This code triggers when the control board detects either an electrical fault in the defrost heater circuit (open or short circuit) or when the defrost cycle runs longer than 80 minutes without the system reaching the expected termination condition. The defrost system relies on a heater element, a thermal cutout fuse, and a bi-metal thermostat working in series to melt frost accumulation off the evaporator coils. A failure in any one of these components, or a wiring/connector issue between them and the PCB, will cause this error to appear.

The most direct diagnostic starting point is disconnecting the defrost connector from the main PCB and measuring resistance across the circuit. A properly functioning defrost heater will show a measurable resistance value. An open circuit (infinite resistance) points to a failed heater element or a blown thermal fuse, while a short circuit (zero or near-zero resistance) suggests a shorted heater coil or wiring fault. The bi-metal thermostat, which opens at a set temperature to terminate defrost, can also fail in either the open or closed position, contributing to either a non-starting or a runaway defrost cycle.

Connector failures are another known cause and should be inspected carefully after taking resistance readings. Corrosion, moisture intrusion, or a loose pin at the PCB connector can mimic an open circuit fault even when the heater and thermal components are intact. If the defrost cycle consistently runs beyond 80 minutes, the root cause may be excessive frost load due to a door seal failure or heavy usage patterns, but component degradation in the heater or bi-metal is the more common culprit in confirmed error code situations.