Written by
Elena Vasquez Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeEVAPORATOR LOW TEMPERATURE
ApplianceBlast Chiller
A non-critical alarm
The manual classes EVAPORATOR LOW TEMPERATURE as non-critical.
How it comes about
Evaporator temperature is too low compared with the current setpoint.
The differential parameter LBT fixes the largest permitted difference between those two values.
In a multistep automatic recipe, a setpoint change followed by some minutes of low evaporator temperature may trigger it.
The LBT parameter
Setting LBT higher avoids the alarm, according to the manual. The parameter lives in the service menu, which is password protected and intended for technicians.
Models and spelling
The touch screen list for the UCBF659, UCBF632, UCBF559, UCBF532 and UCBF432 includes it. In some places the manual prints the name as EVPORATOR LOW TEMPERATURE.
If the alarm keeps returning during your recipes, call (415) 329-7078. Be ready with the model, the recipe in use and the text on the display. Details on U-Line freezer repair for the Bay Area are on the linked page.
Model compatibility: U-Line reuses codes across series and model years, so EVAPORATOR LOW TEMPERATURE 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
The evaporator is too cold against the setpoint, as defined by differential parameter LBT; the alarm is non-critical.
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.
Frozen food gives you little time. See how U-Line freezers, refrigerator/freezer combinations and commercial blast chillers are diagnosed, and what to do…
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
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