Away for the Season: Settings for Wine and Undercounter Units

Sub-Zero’s undercounter guides give extended vacations one short paragraph, and it is written for a refrigerator full of food. On Mercer Island a house left for a season also has to ride out whatever weather arrives while nobody is home, and the city’s own emergency page files power outages together with windstorms, so the question of what to leave running deserves more than a paragraph.

What Sub-Zero tells you to do

For the older UC-24 models and the current Designer undercounter line alike, the advice is the same: turn the unit off at its control panel, empty it, and block the door open slightly so fresh air keeps the inside dry.

That fits an undercounter refrigerator, a beverage center or a pair of refrigerator drawers. It does not fit a cabinet holding a collection you are not taking with you.

A wine unit stays on

A collection cannot sit in a cooler bag for three months, so a unit holding wine keeps running, and the job before leaving is to make it able to run unwatched.

Start at the kickplate: a condenser that clogs while the house is empty has nobody to hear the unit running longer each week. Then look at the door. A door resting a fraction open for weeks lets room air in around the clock, and on Sub-Zero’s undercounter models a door left ajar disables the interior lights, a step Sub-Zero takes to limit heat inside.

An alarm only helps if someone hears it. A UC-24 sounds its chime when the door has been open longer than a minute, and a Designer unit lets you turn the alarm on and choose its duration under Settings. The door alarm page explains why it can sound with the door apparently shut. If a neighbor or a house-sitter looks in, show them the display and the chime. Current Designer undercounter units can also be linked to Sub-Zero’s owner app, which can send alerts such as a door left ajar to your phone.

Sabbath mode is not a travel setting

Owners hunting the panel for a hands-off option sometimes land on Sabbath mode, which exists for religious observance and is certified by Star-K. On Designer models it holds the interior lights on at reduced brightness with the door closed, adding exactly the heat Sub-Zero switches the lights off to avoid, and it ends by itself after 74 hours. On the UC-24 it runs the unit with the lights disabled. Normal operation is the one to leave on.

When you get back

Read the display and the probes before opening the door. A zone where you left it needs nothing. A zone well above its set point, a dark display or, on a UC-24, a flashing SERVICE indicator is worth a call before the bottles are moved, because the readings you take now are the only record of the weeks you were away. For the units you switched off, close the doors, switch them on at the panel, and let them settle before restocking.

The other undercounter units in the house have their own notes in the Under the Counter series. A wine unit that did not hold while you were gone is booked as wine storage repair.

Before you call

1. Step 1

   Clean the condenser before you leave

   Power off at the control panel, gloves on, then a soft brush and a vacuum along the fins behind the kickplate. Sub-Zero gives three to six months for UC-24 units and six to twelve for Designer.

2. Step 2

   Make sure the door seals without a push

   Close it gently and check that no bottle neck, rack edge or shelf item is holding it off the gasket anywhere along its length.

3. Step 3

   Leave a probe in each running zone

   Stand a thermometer in a jar of water midway up each zone. One reading the day you leave and one the day you return shows whether the unit held.

4. Step 4

   Empty and prop open the units you switch off

   An undercounter refrigerator, beverage center or drawers you are not using: off at the control panel, emptied, and the door blocked slightly open so the inside stays dry.

Past these checks the fault is inside the machine. Call Mercer Island Sub-Zero Service on (206) 208-3377 and say which step changed nothing.

Asked about this

Does a Sub-Zero undercounter unit have a vacation mode?

Neither Sub-Zero's guide for the older UC-24 models nor its guide for the current Designer undercounter line lists one. For a long trip, Sub-Zero says to turn the unit off at its control panel, empty it and block the door slightly open. A unit holding wine you are leaving behind should stay running instead, set up to manage alone.

Should we switch off the breaker for the units we are not using?

There is no need. Sub-Zero's UC-24 guide says turning a unit off at its own control panel spares you unplugging it or going to the breaker during a long vacation, and the Designer guide gives the same control-panel instruction. Leave the circuit alone for any wine unit that stays running. Questions go to Mercer Island Sub-Zero Service on (206) 208-3377.