U-Line Refrigerator No Comm: Display and Control Not Talking
No Comm means a U-Line refrigerator has lost communication between its main control board and the display, so the board and display are not exchanging information.
What does U-Line refrigerator & drawers code No Comm mean?
No Comm is a communication message on a U-Line refrigerator. The display and the main control board normally pass information back and forth, such as set points and temperatures. When that link is lost, the display shows No Comm. A loose or damaged data cable is the simplest cause. A failed display or a failed main control board can also stop the exchange. The refrigerator may still cool, but you may not be able to see or change settings until communication returns.
No Comm at a glance
- Code
- No Comm
- Appliance
- U-Line refrigerator & drawers
- Applies to
- U-Line built-in refrigerators with a digital control
- Type
- Needs attention soon
- Can you clear it yourself?
- Sometimes, after the safe checks below
- Most likely cause
- A display or data cable that has come loose
What you may notice with No Comm
- No Comm appears on the display
- Buttons or touch areas do not respond
- The display may be dim, blank or flickering
- The cooling system may still be running
How the refrigerator & drawers detects No Comm
A U-Line refrigerator with a digital control has a main board that runs the cooling and a separate display where you read and change settings. The two exchange short messages many times each second: the board sends temperatures and status, and the display sends back what you press.
If those messages stop, each side detects the silence. After a short wait the display shows No Comm because it cannot get information from the board. The cause can be a cable, a connector, the display's own electronics, or the board's communication circuit. The control cannot tell which, so the message is shown without pointing at a particular part.
Likely causes of No Comm
- A display or data cable that has come loose
- A display that has failed
- A main control board that is no longer sending data
Can you keep using the refrigerator & drawers with No Comm?
You may keep the refrigerator running, but you cannot rely on the display for temperatures or alerts while No Comm shows. Place a thermometer inside and check it a few times a day. Follow USDA and FDA guidance if the interior warms. If you notice burning smells, sparks or buzzing, switch the unit off at the breaker. Ask a technician to test the display and board connection soon.
What you can safely check
- Unplug the refrigerator or switch off its breaker, and leave it off for about a minute.
- Restore power and watch the display.
- Note whether the display lights at all, flickers or shows No Comm again.
- Do not open panels or pull on cables.
- If you can, check the interior temperature with a thermometer. If No Comm returns after the reset, call us.
What our technician does for No Comm
- Check the display and data cable connections
- Test whether the display powers up and responds
- Test the main control board's communication output
- Replace the display or control board if that is the failed part
How to keep No Comm from coming back
- Avoid spraying cleaner directly onto the display, which can run into the connections
- Do not pull the unit out by its front or panel trim, which can loosen the data cable
- Use a surge protector or have the outlet checked in areas with frequent summer storms
Technical reference
- Code
- No Comm
- Appliance
- U-Line refrigerator & drawers
- Control family
- U-Line built-in refrigerators with a digital control
- Maker documentation
- U-Line owner manuals and support
- Checked
- November 2026
Code meanings come from the maker’s documentation and our own repair work; we do not reprint the maker’s document. Confirm the full model number before acting on a code. We are an independent repair company, not affiliated with U-Line Corporation.
Related U-Line refrigerator & drawers error codes
No Comm questions
Is the refrigerator still cooling when No Comm shows?
It may be, because cooling can continue without the display. Check inside with a thermometer, since you cannot confirm temperatures from a display that is not communicating.
Does No Comm mean I need a new control board?
Not always. A loose data cable is a simpler cause, and a failed display is another. A technician tests each before deciding which part to replace.
Why does the display not respond when I press it?
With the link lost, the display cannot send your changes to the board. It may be blank, frozen or locked on No Comm until the connection is restored.
Can a power surge cause No Comm?
It can. A surge may damage the display or the main board's communication circuit. If your area had a storm shortly before the message appeared, mention it so the cause can be tested.
Will No Comm go away if I wait?
Not likely. If the cable is loose, it might reconnect briefly, but a failed display or board stays silent. A short power reset can clear a one-time glitch, though a lasting problem returns.
Need help with No Comm?
A technician finds the cause at your bar or lanai and puts the price in writing before any part comes out.