Written by
Clara Bennett Appliance Care EditorPublished September 3, 2026Updated October 20, 2026
Content status:
Verified
Error codeEr03
ApplianceIce Maker
Quick answer
Er03 on U-Line RNP115 and URNP115 nugget ice machines is an evaporator temperature error after 10 minutes of ice making.
Model compatibility: U-Line reuses codes across series and model years, so Er03 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Er03 means the evaporator temperature is 32F or more after 10 minutes of ice making.
Er03 is an evaporator temperature error on U-Line RNP115 and URNP115 nugget ice machines. It appears when the evaporator is at 32F or more after 10 minutes of ice making.
What to do
Have the sensor and its attachment checked. Restore power only after the cooling problem has been resolved.
Related codes
Er01: the same warm-evaporator condition measured over a longer time
Phone (310) 879-5776 for U-Line ice maker service in Los Angeles when Er03 shows up. Give the model number and describe what you tried. Read about ice maker repair online.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your U-Line appliance?
Book a specialist visit for a clear estimate and approval before any repair.
U-Line products are compact, built-in, and often visually similar across generations. Effective repair starts with the exact model, the symptom you can…
