U-Line Ice Maker Error Code R Evap T Open

R Evap T Open means the control board has detected an open circuit in the right evaporator thermistor loop. The thermistor is a temperature sensor mounted on the right evaporator coil, and an open circuit means the board is receiving no valid temperature signal from it. This can be caused by a loose connector, a failed thermistor, or a break in the wiring harness. The unit may stop producing ice until the fault is resolved.

It is not recommended to continue running the unit with this fault active. Without a valid temperature reading from the right evaporator thermistor, the control board cannot properly manage the refrigeration and harvest cycles on that side, which could lead to incomplete ice production or potential component stress. Addressing the fault promptly helps prevent further issues.

If only the connector needs reseating or cleaning, there may be no parts cost, and a service call fee could range from around 75 to 150 dollars. Replacing the evaporator thermistor typically involves a modest parts cost in the range of 20 to 60 dollars plus labor. If the control board has failed, parts and labor costs can be considerably higher, often ranging from 200 to 400 dollars or more depending on the model.

Start by inspecting the thermistor connector at the right evaporator and at the control board, reseating any loose plugs. If the connection is secure, use a multimeter to test the thermistor resistance across its terminals. If the reading is infinite or clearly out of range, the thermistor needs to be replaced. Also inspect the wiring harness for any visible damage or breaks between the thermistor and the board.

A reset may temporarily clear the displayed fault, but the error will return if the underlying open circuit condition has not been corrected. The fault is triggered by a real electrical condition, not a software glitch, so the thermistor connection, the thermistor itself, or the wiring must be inspected and repaired before the error will stay cleared.