Away for the summer: the refrigerator, on or off.
For a whole summer away, Sub-Zero and GE agree: switch the refrigerator off, empty it and leave the doors open. Sub-Zero draws that line at more than a week, GE at more than a month. Turn the ice maker and its water off; on a Sub-Zero with a water filter, fit a new one before it starts again.
If it has to stay on, a connected Sub-Zero has two vacation modes, set only in the Sub-Zero Group Owner’s App: Short, for a week or less, with the food left in, and Long, for longer, with the perishables out. The rest of a Phoenix summer is heat, monsoon outages and nobody home to see the display.
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How Long Can It Stay On?
Sub-Zero draws the line at a week, GE at a month. Each row is one maker’s published advice for one length of absence.
| Away for | What the maker says to do | Source |
|---|---|---|
| Sub-Zero | ||
| A week or less | Perishables out; ice maker off and the bin emptied, or the bin removed where there is no ice maker key. Settings unchanged. | Sub-Zero, vacation settings |
| A week or less, app connected | Short Vacation Mode: refrigerator 34°F, freezer 5°F; the food can stay. | Sub-Zero, Short Vacation Mode |
| More than a week | Power off at the control panel, or at the breaker where there is none. Emptied, doors blocked open, water off if possible, and a new water filter before start-up where one is fitted. | Sub-Zero, vacation settings |
| More than a week, app connected | Long Vacation Mode: refrigerator 44°F, freezer 5°F, every perishable out. Sub-Zero suggests considering off and empty instead. | Sub-Zero, Long Vacation Mode |
| Undercounter ice maker, more than a week | Water and power both off, never on with the water off; the UC-15I also cleaned, drained and left with its door partly open. | Sub-Zero, vacation settings; UC-15I shutdown |
| GE Appliances | ||
| A month or less | Left running at normal settings, or warmer once all food is out. Perishables out, ice maker and water off, jugs of water if it is less than half full. | GE, vacation and storage |
| More than a month | Control off, ice maker and water off, all food out, breaker off or unplugged. Washed with baking soda solution and dried, baking soda or coffee grounds inside, doors open. | GE, vacation and storage |
GE’s advice covers its refrigerators in general, not one Monogram model. Viking is left out: we hold no vacation advice from Viking to quote.
Why not just leave it running?
Sub-Zero gives its reasons. A unit left on through a long absence could cause issues in the home, could ruin its own interior if it stopped cooling, and a leaking water valve could damage the floors. It adds that units are designed to be opened occasionally when running, which a summer of closed doors is not.
Off also means open. Sub-Zero asks for the doors blocked open to let fresh air in and keep the interior dry; GE calls it important, against odors, mold and mildew.
Leaving it on remains the owner’s call, and Sub-Zero says as much. But Long Vacation Mode wants every perishable out, so a freezer that must keep its contents through July means normal settings, or only the refrigerator section switched off.
What About the Ice Maker and the Water?
The water line is where a built-in can damage the house rather than the food.
- 01
The ice maker goes off with the water
GE: if you shut off the water supply to the refrigerator, you must turn off the ice maker. On a Sub-Zero 600-2 that is the ICE ON/OFF key, and ICE leaves the display; without a key, Sub-Zero says removing the bin switches the ice maker off.
- 02
Close the valve if you can
For a unit switched off for an extended vacation, Sub-Zero calls closing the water a good precaution, though not required. GE lists the water as off for every absence, short or long.
- 03
An undercounter ice maker is the strict case
Water and power both off, and never on with the water closed. Sub-Zero’s UC-15I shutdown runs to twelve steps, from sanitizing and draining to a door blocked partly open against mildew.
- 04
On return, a new filter and the first ice thrown out
A new filter before start-up where one is fitted (the 600 and 700 Series have none), then the first several glasses of water and the first two full containers of ice discarded, and the indicator reset on the appliance: a power loss does not reset it. GE asks for three or four glasses from the dispenser.
Ice machine cleaning in this valley’s water: what hard water does to the ice maker. The refrigerator filter’s own schedule: Sub-Zero filters, and a smell.
What do Sub-Zero’s vacation modes do?
Both are set only in the Sub-Zero Group Owner’s App, never at the control panel, and stay on until the app changes them. Short Vacation Mode, offered on Classic (BI, CL), Designer (IT, IC, ID, DET, DEC) and Designer Undercounter (DEU), keeps food well at low energy use and shows VA So. Long Vacation Mode, listed for Classic (BI) and Designer (IT, IC), shows VA Ln and reduces food preservation; its 44°F refrigerator is above the 40°F line FoodSafety.gov uses for perishable food.
The control panel has its own answer: switching off one section of a combination unit, which Sub-Zero documents for most of its series. On the Classic (BI) a section can stay off for an extended period without disrupting the other, and shows two dashes where its temperature was. That is how a freezer keeps running beside an empty, open refrigerator. On the 600 Series it works from serial number 1810000, though not on the 601R and 601F; earlier units need a compressor wire disconnected, which is a technician’s job.
Which of these a unit has depends on its rating tag: which Sub-Zero series do you have?
What does an empty house add in a Phoenix summer?
First, the room. Sub-Zero’s 600-2 service manual has technicians tell owners that the unit performs best between 60°F and 90°F, and the thermostat left behind decides which side of 90°F the kitchen spends July on. What the heat does inside the cabinet.
Then the storms. The National Weather Service in Phoenix counts the monsoon season from June 15 to September 30, and its thunderstorm outflows can bring winds of 50 mph or more; APS says power outages from these fast-moving storms can and do occur. In an empty house, nobody sees the power go or come back.
Then the restart. Sub-Zero says its units are designed to turn back on when power is restored, but that a surge protector, an AFCI or a GFCI may prevent it, leaving the unit off after an outage; where storms and outages are frequent, it advises consulting an electrician. A unit switched off for the summer has nothing to restart.
If someone looks in after a storm, a minute is enough: a temperature on the display, not a dark panel, and the breaker on. The rest of the list for the week you go: before you leave for the summer.
What Should You Check When You Come Home?
Six checks, the first before a door is opened.
- 01
Read the display first
A temperature means it is on. OFF means switched off; two dashes, a section disabled; VA So or VA Ln, a vacation mode still set. A dark panel means power first: the breaker, a GFCI or a surge protector. Or Sabbath Mode, which darkens a 600-2’s display while it keeps cooling.
- 02
Write down anything flashing
On a 600-2, a flashing SERVICE is a logged fault, and a power cycle clears it: note it, with the temperatures, before anything is reset. What the codes mean.
- 03
Know how far back the log reaches
The 600-2 keeps two-hour average temperatures for fourteen days and marks each period in which the power failed; a technician reads it back at the panel. After a summer away, that is the last two weeks, not July.
- 04
Put a thermometer in each compartment
The USDA’s Food Safety and Inspection Service asks for an appliance thermometer in both: 40°F or below in the refrigerator, 0°F or below in the freezer. It tells you about now, not about July.
- 05
Judge the food by the rules
By FoodSafety.gov, refrigerated perishables are discarded after 4 hours without power; frozen food can be refrozen if it still has ice crystals or is at 40°F or below. Never taste to decide. If there is no telling how long it was warm: when in doubt, throw it out. The keep-or-discard charts.
- 06
Then give it a day
Sub-Zero allows 24 hours to reach a new setting, and a 600-2 holds its compressor off for at least three minutes after being switched on. On a Classic (BI), a switched-off section whose lights have timed out behind an open door needs that door closed for 45 minutes, or a breaker reset, before it will turn back on.
Town by town: the first day back in Fountain Hills, the unit nobody opens in Paradise Valley. Still warm after a day? The visit is $119 for the first appliance and $69 for each additional one on the same visit, each waived when you go ahead with that appliance’s repair. How the pricing works.
Questions
Should I leave my Sub-Zero on while I’m away for the summer?
Past a week, Sub-Zero’s advice is to switch it off at the control panel, empty it and block the doors open to keep the interior dry, with a new water filter, if it has one, before start-up. Exceptions are the owner’s call; if it stays on, take every perishable out, switch the ice maker off, and use Long Vacation Mode on a unit connected to the Sub-Zero Group Owner’s App.
What does Sub-Zero’s vacation mode do?
There are two, set only in the Sub-Zero Group Owner’s App. Short Vacation Mode, for a week or less, holds the refrigerator at 34°F and the freezer at 5°F with the food left in, and shows VA So. Long Vacation Mode, for more than a week, holds 44°F and 5°F, reduces food preservation, needs every perishable out, and shows VA Ln. Each stays set until the app changes it.
Do I need to turn off the water to the refrigerator?
GE says yes, for any absence, and that the ice maker must be turned off whenever the water is. Sub-Zero says it is not required for a unit switched off for an extended vacation but is a good precaution, because a leaking water valve could damage floors. For an undercounter ice maker it is firm: water and power both off, never on with the water closed.
Why would a refrigerator stay off after a power outage?
Sub-Zero says its units are designed to turn back on when power is restored, but a surge protector, an AFCI or a GFCI may keep power from reaching the unit, so it can stay off after an outage. Check the breaker, write down anything on the display before switching anything off, and judge the food by the FoodSafety.gov rules: when in doubt, throw it out.
Sources
- Sub-Zero: vacation settings, the lines at a week and the reasons against leaving a unit on; Short and Long Vacation Mode; turning off one section, with the Classic (BI) and 600 Series pages.
- Sub-Zero: internal surge protectors; shuts off by itself; water filter replacement; UC-15I prolonged shutdown; temperature settings, the 24 hours.
- Sub-Zero Built-In (600-2) Series technical service manual (Job Aid #3758407, 2005): the ICE ON/OFF key, p. 3-7; the three-minute compressor delay, p. 3-14; Sabbath Mode, p. 3-17; one compartment disabled, p. 3-18; the temperature log, pp. 3-23, 3-25 and 3-26; a flashing SERVICE, pp. 8-7 and 8-8; 60°F to 90°F and the first checks for a warm unit, p. 8-9.
- GE Appliances, refrigerator vacation and storage recommendations: a month or less, and more.
- FoodSafety.gov, “Food Safety During Power Outage”, last reviewed August 8, 2024; USDA Food Safety and Inspection Service, food safety in emergencies and appliance thermometers.
- National Weather Service Phoenix, monsoon awareness: June 15 to September 30, outflow winds of 50 mph or greater. APS, “As monsoon season begins, APS offers ways to prepare and stay safe”, June 15, 2022.
Written from these sources and reviewed on by Aphelion Appliance Repair, Phoenix. Each piece of advice belongs to the maker and series named beside it; for your own model, its use and care guide is the one that counts.
Read Next
- After a power outage: keep it, or throw it out?The USDA hours, the 40°F line, the keep-or-discard charts.
- What a Phoenix summer asks of a refrigeratorThe room a built-in expects, and desert dust on the condenser.
- Sub-Zero filters, and a smellWhen the filter is due, and what Sub-Zero blames for a smell.
- A built-in in the garage or the outdoor kitchenWhat a garage or a ramada does to the room its maker asks for.
Back home, and still warm?
Tell us the make, what the display showed when you walked in, and how long the house stood empty. We answer every day, 7am–6pm.