U-Line Nugget Ice Machine Code 12: Reservoir Water Level Low

What E12 means

On U-Line nugget ice machines such as the UONB115 and UHNB315, the display shows 12 when the water level is low. No letter E appears before the number. The machine is not getting enough water into the reservoir, so ice making slows or stops until the level recovers. Once enough water reaches the reservoir, the display clears and ice production resumes.

Common causes of E12

The water supply is restricted or turned off
The fill line is kinked or the inlet is clogged
The water level sensing reads low

✓ One safe check you can try

1. Check that the water supply valve is fully open. 2. Look along the water line for kinks. 3. Switch the machine off for ten minutes and restart it. 4. Do not open panels. 5. If 12 reappears, call us for testing.

! Why to stop there

Low water has several causes, from supply to sensing
Testing finds the one that applies
We quote the price before any work begins

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Ice Machine codes

Ice / Off scrolling with SPU-Line Echelon 2000 Message "Ice / Off scrolling with SP": ice maker off mode CLU-Line Echelon 2000 Message "CL": self-cleaning cycle running CLR2060 one flashU-Line CLR2060 One flash: overflow protection circuit open CLR2060 two flashesU-Line CLR2060 Two flashes: open thermistor or too warm CLRCO2075 LED 2 flashingU-Line CLRCO2075 LED 2 flashing: open thermistor CLRCO2075 LED 3 flashingU-Line CLRCO2075 LED 3 flashing: drain pump blocked or overloaded E10U-Line Nugget Ice Machine Code 10: Door 2 Open E11U-Line Nugget Ice Machine Code 11: Reservoir Water Level High

E12E12 questions

Why does the panel say 12 and not E12?

The panel shows the number only. It reports that the water level in the reservoir is low, and it reads the same as the E-numbered code.

What does 12 mean?

Not enough water is reaching the reservoir. Check the supply valve and the line for kinks first, since a closed valve gives the same display.

Is 11 related to 12?

They are opposites. 11 reports a high reservoir level and 12 reports a low one, so the pair tells us whether water is backing up or failing to arrive.