Written by
Elena Vasquez Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeHIGH TEMPERATURE
ApplianceBlast Chiller
This alarm is about cabinet air being too warm while the chiller is holding. Once the temperature goes above the upper limit, HIGH TEMPERATURE is displayed.
The limit in brief
The alarm belongs to the holding cycle only.
The upper limit is parameter ALH.
ALH is set as a differential to the setpoint.
Which chillers
The touch screen controller on the UCBF432, UCBF532, UCBF632, UCBF559 and UCBF659 lists this alarm.
Compare with
The opposite case, air that is too cold, is LOW TEMPERATURE. A pressure problem is a different alarm again: HIGH PRESSURE.
Service for U-Line blast chillers in San Francisco
If the alarm shows while the unit is holding, San Francisco and Bay Area callers can use (415) 329-7078. Please note the model number and when the alarm showed up. Details are under U-Line freezer repair.
Model compatibility: U-Line reuses codes across series and model years, so HIGH 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
During holding cycle, air temperature rose above the higher limit (parameter ALH).
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.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your U-Line appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
