Power, heat, fire and salt
How Long Will a Sub-Zero Stay Cold Without Power?
| What you are looking at | What it means |
|---|---|
| Empty cabinet, supply cut | Around three hours before the refrigerator side passes 45°F and the freezer side passes 20°F |
| Cabinet full of food | Longer, because the food itself is the cold store; how much longer depends on what is in there |
| Doors opened to check | Each look spends cold that cannot be put back until the supply returns |
| Refrigerated item reaching 42°F | Sub-Zero's line is not to keep it, whatever the clock in your head says |
| Frozen food above 20°F | Not to be refrozen; cook it while it is still sound, or let it go |
The three-hour figure is for an empty cabinet, so treat it as the floor rather than the forecast. Sub-Zero Appliance Repair Los Angeles takes outage calls on (310) 496-7399 once the supply is back.
- Condenser coil
- Condenser fan
What the three hours assume
Sub-Zero’s figure is measured on an empty cabinet: nothing inside but air, and air leaves the moment a door swings. A stocked one behaves quite differently.
Measure before you throw anything out
A thermometer standing in a glass of water reports what the food has been through; the panel reports the setting somebody chose. Give the glass twelve hours in the middle of the compartment for the real number.
Two more things people ask
- Does a full freezer really hold longer than a half-empty one?
- Yes, and it is worth loading before a planned cut. Frozen mass behaves like a store of cold, so a packed compartment coasts while a half-empty one warms in the gaps. Bags of ice fill those gaps; dry ice goes in its own container.
- It is cold again but not as cold as before. Now what?
- Give it a day. A cabinet emptied of cold needs time to pull back down, and a coil furred with dust makes that slower still. If the refrigerator side is still above its setting tomorrow, call Sub-Zero Appliance Repair Los Angeles.
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