U-Line Outdoor Nugget Ice Maker Shows 10: Door 2 Not Closed
Seeing a bare 10 on a U-Line nugget ice maker from the Outdoor Collection means Door 2 is open or not sensed as closed. Ice making pauses until that door is shut.
What does U-Line outdoor refrigeration code 10 mean?
The UONB115 and UONP115 nugget ice makers in the U-Line Outdoor Collection show a bare 10 when Door 2 is open. No letter appears in front of it. The second door has not been detected in its closed position, so ice production pauses until the door is shut and sensed. The first door shows E9 instead, which lets you separate the two doors at a glance. A door that is shut yet still shows 10 points toward the switch or the seal.
10 at a glance
- Code
- 10
- Appliance
- U-Line outdoor refrigeration
- Applies to
- U-Line Outdoor Collection nugget ice makers
- Type
- Normal status, not a failure
- Can you clear it yourself?
- Yes, it is a normal message or setting
- Most likely cause
- Door 2 stood open or was left ajar
What you may notice with 10
- The number 10 appears alone on the display
- Ice stops coming while the message shows
- Door 2 sits slightly off the cabinet frame
- Ice in the bin feels softer than usual
How the outdoor refrigeration detects 10
Each door of an Outdoor Collection nugget ice maker carries a switch that tells the control whether that door is sitting closed. The control keeps the two doors apart, so it can say which one is open. Door 2 is the second door, and when its switch stops reporting a closed position, the panel shows 10 with no letter ahead of it.
The control responds by pausing ice production. That makes sense for a unit that lives outside: an open door lets warm outdoor air reach the ice and the cold surfaces, and stored ice softens quickly. Once the switch reports Door 2 closed again, the number disappears and ice making picks up where it left off. Door 1 is watched separately and reports as E9, so one door can be fine while the other shows its message.
Why 10 appears
- Door 2 stood open or was left ajar
- An object is propping the door away from the cabinet
- The seal on Door 2 has slipped out of place
- The second door switch does not report closed
Can you keep using the outdoor refrigeration with 10?
Yes. The number 10 is a door message, not a safety problem. Close Door 2 properly and the unit should go back to making ice. Until it does, expect no new ice, and expect the ice already in the bin to melt faster than it would behind a sealed door. If 10 stays on with the door shut, you can leave the unit powered, but the ice supply remains paused until the switch or the seal is dealt with.
What you can safely check
- If the ground around the unit is wet, shut off its breaker before touching it; if it is dry, leave it running.
- Push Door 2 shut and confirm that it latches.
- Take away anything leaning on the door edge.
- Look along the seal to see that it lies flat against the opening.
- Check that the cabinet stands level.
- If 10 stays up with the door closed, contact us.
What our technician does for 10
- Test the Door 2 switch for a clean closed signal
- Inspect the Door 2 seal and hinge alignment
- Check for grit or moisture where the switch sits
How to keep 10 from coming back
- Keep covers, bags and other items off the Door 2 edge so it can close fully.
- Wipe the seal now and then so dirt and sticky residue do not hold the door off.
- Brush away leaves and grit near the door frame, since outdoor units collect debris where the switch sits.
Technical reference
- Code
- 10
- Appliance
- U-Line outdoor refrigeration
- Control family
- U-Line Outdoor Collection nugget ice makers
- 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 outdoor refrigeration error codes
10 questions
Why does the display show 10 rather than E10?
These outdoor nugget models print Door 2 as a bare number. Its meaning matches a lettered door code, namely that the second door has not been sensed shut.
Is 10 about water?
No. On this outdoor platform the number refers to Door 2. Water readings use 11 for high and 12 for low, and each has its own page.
Does 10 go away on its own?
It does, as soon as Door 2 is shut and the control picks that up. A number that stays behind a closed door points to the switch or the seal fit.
How do I tell 10 from E9 on this ice maker?
E9 reports Door 1 and 10 reports Door 2. If you see one of them, check that door first. If both doors were open, the display shows whichever the control picks up.
Can the number 10 appear while Door 2 is closed?
Yes, if the switch or the seal fit stops the control from confirming a closed door. Clear the door edge and push it shut again. If the number stays, the switch needs a test.
Something else going on with your outdoor refrigeration?
A technician finds the cause at your bar or lanai and puts the price in writing before any part comes out.