Written by
Elena Vasquez Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeE4
ApplianceRefrigerator
Newer UHRE, UHWC, UHBD, UHRI and UHRF units
The error log in these manuals shows E4 as thermistor 4 open and then says it does not apply to the model. Faults are saved to memory and scrolled through in the log, and only a door error appears on the display along with a beep.
Echelon and Origins units
Here E4 is a record that the compressor ran continuously, with no break, between two defrost cycles. It never appears on the display. You will find it only in the error log.
What the manuals leave to the owner
Nothing is listed. If you read E4 in the log and the cabinet is also failing to hold its temperature, or the code keeps returning, arrange service.
Codes people confuse with E4
E3 is thermistor 3 open, and unlike E4 it does apply to newer models.
E10 is the top drawer open for more than 20 minutes.
Service for a U-Line refrigerator in the Bay Area
A U-Line refrigerator, wine cabinet or beverage center in San Francisco that needs a look can be booked through (415) 329-7078; the U-Line refrigerator repair page covers the details. Please have the model number, the code from the log and a list of anything you have tried at hand.
Model compatibility: U-Line reuses codes across series and model years, so E4 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
E4 is thermistor 4 open, which the manuals mark as not applicable to the listed newer models, and a log-only compressor runtime entry on Echelon and Origins.
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.
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.
