U-Line Refrigerator Error Code 3 Flashes

On U-Line refrigerators equipped with the CLR2060 new control board, a 3-flash error code indicates that the control board has simultaneously detected two fault conditions: an open overflow protection circuit and an open or out-of-range thermistor. This dual-fault scenario is specific to the CLR2060 board and means the unit's control system cannot verify either the water overflow safety status or the temperature sensing input. Both circuits must be functional for the refrigerator to operate normally.

The overflow protection circuit is a safety mechanism designed to detect water accumulation in areas where excess moisture could cause damage. When this circuit reads as open, the board interprets it as a break in continuity somewhere along the circuit path, which could stem from a disconnected wire, a failed sensor, or a corroded connector. Simultaneously, an open or out-of-range thermistor means the temperature sensor is either disconnected, has failed to an open state, or is returning resistance values outside the acceptable range for the board to process a valid temperature reading.

Because both faults are reported together under a single 3-flash code on the CLR2060 board, diagnostics must address both circuits before the error can be resolved. A technician should inspect wiring harness connections at both the overflow sensor and the thermistor, check thermistor resistance against the expected specification range, and test continuity through the overflow protection circuit. In some cases, a single wiring event such as a harness pull or connector failure can affect both circuits at once, making a thorough physical inspection an essential first step.