Written by
Elena Vasquez Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeFOOD PROBE (PT4)
ApplianceBlast Chiller
Label PT4 stands for insert probe core 4, which closes out the set of four. A failure of that probe makes the display read FOOD PROBE (PT4). The manual’s only response is to call service.
HIGH PRESSURE: a separate alarm about head pressure.
San Francisco blast chiller repair and service
Operators in San Francisco and across the Bay Area can reach us at (415) 329-7078 when PT4 appears. Keep the model number and a short note of anything already tried within reach. Our U-Line freezer repair page describes the wider service.
Model compatibility: U-Line reuses codes across series and model years, so FOOD PROBE (PT4) 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
Insert probe core 4 failure. Call service.
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.
