U-Line Ice Maker Error Code R Zone T Short

R Zone T Short means the thermistor circuit monitoring the right temperature zone has detected a short circuit condition. The control board is receiving an abnormally low resistance signal from that sensor or its wiring. This prevents accurate temperature monitoring and will typically cause the unit to stop normal operation until the fault is resolved.

Continuing to run the unit with an active thermistor short is not recommended. Without accurate temperature feedback from the right zone, the ice maker cannot regulate that area properly, which could lead to inconsistent ice production, component stress, or further damage. It is best to address the fault before resuming normal use.

A power reset may temporarily clear the error code, but it will return as soon as the control board reads the thermistor circuit again and detects the short. The underlying cause, whether a damaged cable, a failed sensor, or a corroded connector, must be identified and corrected before the error will clear permanently.

A knowledgeable DIYer can start by visually inspecting the thermistor cable for pinch points, cuts, or connector corrosion, which are the most common causes. If the cable looks intact, testing the thermistor with a multimeter to check for abnormally low resistance is the next step. Thermistor and wiring replacement are straightforward repairs, but if the control board is involved, professional service is recommended.

Repair costs vary depending on what component has failed. A thermistor sensor or wiring harness replacement is generally a lower-cost repair, typically in the range of $50 to $150 for parts, plus any labor charges. If the control board requires replacement, costs can rise to the $200 to $500 range or higher depending on the model and service rates in your area.