U-Line Ice Maker No Comm: Display and Control Board Link Lost
No Comm on a U-Line ice maker means the display and the main control board have stopped exchanging data. A loose cable, failed display or failed board may be responsible.
What does U-Line ice machine code No Comm mean?
No Comm on a U-Line ice maker tells you the main control board and the display can no longer exchange data. The board that runs the unit and the panel you read have stopped trading information. A loose display or data cable, a display that has failed, or a main control board that has failed can each cause it. The message does not say which, so the link has to be tested piece by piece to find where it stops.
No Comm at a glance
- Code
- No Comm
- Appliance
- U-Line ice machine
- Applies to
- U-Line ice makers with a display and main control board
- Type
- Needs attention soon
- Can you clear it yourself?
- Sometimes, after the safe checks below
- Most likely cause
- A loose display or data cable
What you may notice with No Comm
- The display reads No Comm in place of its normal screen
- Buttons on the panel do not respond
- The display goes blank or flickers after a power blip
- Ice making seems to stop or becomes irregular
How the ice machine detects No Comm
An ice maker like yours has two electronics working together. The main control board runs the freeze cycle and reads the sensors, and the display shows information and takes your settings. A cable between them carries a steady stream of messages in both directions.
The control expects those messages to keep coming. When they stop, because a plug has loosened, the display has quit or the board is not sending, the control reports No Comm. This is a message about the link between parts and not about temperature or water. The unit might continue on its last settings for a while, but you lose the ability to read or change anything.
Likely causes of No Comm
- A loose display or data cable
- A display that has failed
- A main control board that has failed
Can you keep using the ice machine with No Comm?
You can leave the unit plugged in for a short time and keep an eye on it. Without the display you cannot confirm what it is doing, so check the bin for ice and look for leaks. If you see water, hear odd noises or the ice melts, switch it off at the breaker and have it checked.
What you can safely check
- Switch the ice maker off at the breaker or unplug it, and shut the water supply valve if one is within easy reach.
- Give it a short rest with the power off, then switch it back on.
- Watch the display during startup and see whether No Comm returns right away or later.
- Look at the panel for cracks, moisture or damage, without removing anything.
- If No Comm returns, call us and tell us whether ice is still being made.
What our technician does for No Comm
- Inspect and reseat the display and data cable connections
- Test the display separately to see if it has failed
- Test the main control board to decide whether it needs replacing
How to keep No Comm from coming back
- Avoid pressing or prying at the control panel when cleaning
- Keep water and cleaning spray off the display
- Use a surge protector so storm spikes do not damage the electronics
- Do not switch the unit off and on repeatedly without a reason
Technical reference
- Code
- No Comm
- Appliance
- U-Line ice machine
- Control family
- U-Line ice makers with a display and main control board
- 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 ice machine error codes
No Comm questions
Is the ice maker still making ice with No Comm?
It may be, but you cannot rely on it. The display link is down, so you cannot see settings or confirm what the board is doing. Watch the bin and note what happens.
Does a restart help with No Comm?
A restart sometimes lets the display and board reconnect, particularly if a plug was only loose. If the message returns, the link or a part has a real problem.
Is it the display or the board?
The message cannot tell you. The cable, the display and the board are all possible, so a technician tests each link instead of replacing parts at random.
Can a power outage cause No Comm?
An outage or surge can upset the electronics, and the message sometimes follows one. If it did, tell us when you call, since the display and board are then the first things to test.
Will No Comm clear by itself?
It can if a connector only needed to settle, but a failed part will keep bringing it back. If it returns after a restart, treat it as a real problem with the link.
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.