Sub-Zero UC-15I Ice Maker Blue Ice Light Flashing: automatic shut-off

What Ice light flashing (blue) means

On Sub-Zero UC-15I undercounter ice makers, including the UC-15IP and UC-15IO, a flashing blue ice light means the unit has shut itself off automatically. This happens after two back-to-back maximum-length freeze or harvest cycles of about 55 minutes each, or after 120 continuous cycles without the bin switch being satisfied. Owners see the blue light flashing and ice production stopped.

Common causes of Ice light flashing (blue)

A freeze or harvest cycle running to its maximum length twice in a row
Ice not dropping or the bin not filling enough to satisfy the bin switch
A water supply issue slowing ice formation
A bin switch that does not detect a full bin

✓ One safe check you can try

1. Check that the water supply valve to the ice maker is fully open. 2. Look in the bin for ice clumps or a jam near the bin switch. 3. Turn the breaker off for a minute and back on to restart. 4. If the blue light flashes again, call us.

! Why to stop there

The bin switch and freeze parts sit inside the cabinet
Water and electrical parts need to be tested together
Repeated shut-offs point to a cause that needs diagnosis

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 Makers codes

40-8-01Sub-Zero Classic Code 40-8-01: ice maker overfilling 95-D-01Sub-Zero Designer Ice Maker Code 95-D-01: drain pump float tripped repeatedly

Ice light flashing (blue)Ice light flashing (blue) questions

Why did my UC-15I stop making ice with a flashing blue light?

The control shut the unit off after cycles ran too long or after many cycles without the bin switch being satisfied. It protects the unit until the cause is found.

Can I restart it?

Yes, a breaker reset restarts it. If the cause remains, the blue light will flash again after the same pattern repeats. Check the water supply before restarting.

What will a technician look at?

We check water supply, the bin switch and freeze and harvest operation. You approve a written price first, and our workmanship carries a 30-day warranty.