U-Line Refrigerator Error Code Temp Lo 6H+

This code means that a specific zone inside your U-Line refrigerator has been running more than 10 degrees Fahrenheit below your set point temperature for over six consecutive hours. The control board monitors zone temperature through a thermistor and flags this fault when the sustained low-temperature condition exceeds the six-hour threshold. The most likely causes are a faulty thermistor, a bad thermistor connection, or a zone valve that is not cycling correctly.

Because this fault indicates the zone is running colder than set, not warmer, refrigerated items are unlikely to spoil due to the error itself. However, if the zone temperature has dropped far enough, items like fresh produce, beverages, or dairy could be at risk of freezing and being damaged. Check the actual contents of the affected zone and remove anything that should not be frozen while you address the fault.

Repair costs vary depending on which component is at fault. Thermistor replacement is typically the least expensive fix, with parts generally ranging from around 20 to 60 dollars plus labor. Zone valve replacement tends to run higher, with parts in the range of 50 to 150 dollars or more depending on the model. If a control board is involved, costs can increase significantly. A diagnostic service call from a qualified technician will give you a firm estimate for your specific situation.

Some steps are DIY-friendly, such as inspecting the thermistor wiring connector for corrosion or moisture and cleaning or reseating it. Testing thermistor resistance with a multimeter is also within reach for a knowledgeable DIYer if you have the correct resistance specifications for your model. However, diagnosing and replacing a zone valve or control board typically requires more advanced technical skill and specialized tools, so professional service is recommended for those components.

A power reset may temporarily clear the displayed code, but if the underlying cause, such as a faulty thermistor or malfunctioning zone valve, is still present, the unit will detect the condition again and the code will return after another six hours. Clearing the code without fixing the root cause does not resolve the problem. A proper repair requires diagnosing and correcting the defective component.