--- title: "Freezer Food After a Power Outage: What Stays, What Refreezes, What Goes" description: "Keeping the lid shut, FDA's 48 and 24 hours, dry ice for a big chest, reading the thermometer before anything else, and why this site uses 2 hours above 40°F." url: "https://freezerrepair.center/guides/freezer-food-after-a-power-outage/" date_modified: "2026-09-26" --- Food safety and power # Freezer Food After a Power Outage: What Stays, What Refreezes, What Goes Sorting freezer food after a power outage takes a thermometer and a closed lid. FDA says a full freezer holds about 48 hours shut, a half-full one about 24. Anything at 40°F or colder, or still carrying ice crystals, can be refrozen or cooked; perishables that sat above 40°F for 2 hours or more are thrown out. By [FreezerRepair.center technical team](https://freezerrepair.center/authors/technical-team/) Published September 26, 2026 ## At a glance. A standalone freezer is usually the fullest cold box in the house, stocked with meat bought on sale, garden vegetables and a season of cooking. When the lights go out, the first decision is not what to throw away but how to stop opening it. Read the whole guide ### Full freezer, lid or door shut About 48 hours FDA's figure; half full, it is about 24 hours. ### Safe to refreeze or cook Ice crystals, or 40°F or colder Checked with an appliance thermometer or package by package. ### Throw out Perishables above 40°F for 2 hours or more The stricter of FDA's two published figures, which this site follows. ### Dry ice for a big freezer 50 pounds for 18 cubic feet, two days FDA's example for a fully stocked unit; handle it with gloves. In this guide 1. While the power is off 2. How long a closed freezer really holds 3. When the power comes back: thermometer first 4. Why this site uses 2 hours, not 4 5. Checking the freezer itself once it is running 6. Step by step 7. Questions ## While the power is off Every opening costs cold. A chest freezer loses less when its lid is lifted, because the cold air sits low in the well, but an upright spills a shelf's worth of chilled air onto the floor each time the door swings. Tape a note to the handle so nobody in the household checks it out of curiosity, and write the time the power went off on the same note. Frozen food packed tightly holds its temperature far better than a few packages rattling around in empty space. If the freezer is half full, push everything together into one block and do not spread it out to look for things. - Keep the lid or door shut and label it with the time. - Consolidate a half-empty load into one tight mass. - Add dry ice, block ice or bagged ice if the outage looks long. - Move food to a working freezer or iced coolers while it is still frozen hard. ### Dry ice, block ice and bags of cubes In FDA's example, an 18 cubic foot freezer packed to the top stays cold for about two days on fifty pounds of dry ice. Lay it on cardboard over the top packages, never bare on a plastic liner, and wear gloves; Frigidaire's chest freezer manual asks for the same care. Block ice and bags of cubes help too, but they melt into the load, so put them in pans or sealed bags. ### Moving the food somewhere cold USDA suggests carrying food to a friend's freezer until power returns. A neighbor on another circuit, a relative across town or a set of well-packed coolers with ice all work, and the move is worth making early, while packages are still hard. Snow outside is not a freezer: USDA warns that sun can thaw food even on a very cold day. Source: [FDA — Food and Water Safety During Power Outages and Floods](https://www.fda.gov/food/buy-store-serve-safe-food/food-and-water-safety-during-power-outages-and-floods) — A full freezer holds about 48 hours (24 half full) with the door closed; 50 pounds of dry ice keeps an 18 cubic foot full freezer cold two days; at 40°F or below or with ice crystals food may be refrozen or cooked; this page states 4 hours above 40°F for discarding perishables; [USDA FSIS — Freezing and Food Safety](https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/freezing-and-food-safety) — A full freezer keeps about 2 days shut, half full about a day; move food to a friend's freezer or add ice; food outdoors can thaw in sunshine even in very cold weather; [Frigidaire — Chest Freezer User Manual (A31283301)](https://frigidaire.bynder.com/asset/ee34c64d-380c-4b79-840f-d5ccd0a253b2/A31283301en-US-pdf.pdf) — Keep the lid closed and frozen food stays frozen at least 120 hours on that model; wear gloves with dry ice; the display shows HI when the temperature exceeds the set level ## How long a closed freezer really holds FDA's figures are the ones to plan by: roughly 48 hours for a full freezer and 24 hours for one that is half full, as long as nobody opens it. USDA puts the same thing as about two days and about one day. These are general numbers across freezers, not a promise for any one cabinet. Makers sometimes publish longer times for their own models. One Frigidaire chest freezer manual says its lid kept shut holds frozen food for at least 120 hours. That is the maker's claim for one heavily insulated chest; for deciding what to eat, stay with FDA's numbers and the thermometer. ### Why the type of freezer matters ENERGY STAR notes that a chest freezer lets less cold air escape because it opens from the top. In an outage that difference compounds. Built-in columns and undercounter drawer units are smaller and often half empty, so they tend to warm sooner than a packed chest in a cool basement. Source: [FDA — Food and Water Safety During Power Outages and Floods](https://www.fda.gov/food/buy-store-serve-safe-food/food-and-water-safety-during-power-outages-and-floods) — A full freezer holds about 48 hours (24 half full) with the door closed; 50 pounds of dry ice keeps an 18 cubic foot full freezer cold two days; at 40°F or below or with ice crystals food may be refrozen or cooked; this page states 4 hours above 40°F for discarding perishables; [USDA FSIS — Freezing and Food Safety](https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/freezing-and-food-safety) — A full freezer keeps about 2 days shut, half full about a day; move food to a friend's freezer or add ice; food outdoors can thaw in sunshine even in very cold weather; [ENERGY STAR — Freezers](https://www.energystar.gov/products/freezers) — A chest freezer opens from the top and allows less cold air to escape; [Frigidaire — Chest Freezer User Manual (A31283301)](https://frigidaire.bynder.com/asset/ee34c64d-380c-4b79-840f-d5ccd0a253b2/A31283301en-US-pdf.pdf) — Keep the lid closed and frozen food stays frozen at least 120 hours on that model; wear gloves with dry ice; the display shows HI when the temperature exceeds the set level Close on a thermometer tucked between frozen packages in a closed-up cooler of ice. ## When the power comes back: thermometer first If an appliance thermometer was already in the freezer, read it before touching anything else. FDA's rule is short: at 40°F or below, the food is safe and may be refrozen. The number on a digital display is less useful at this moment, because many controls restart and show the current air temperature, not the warmest point reached while they were off. Some freezers keep a record. A high-temperature alert that shows on the display after power returns tells you the cabinet went above its setting; the Frigidaire chest freezer mentioned above shows HI for this. Note what the alert said before pressing any button, because clearing it erases the evidence. - Hard frozen or icy in the middle: refreeze it. - Soft but still 40°F or colder: refreeze or cook it now. - Perishable and above 40°F for 2 hours or more: discard it. - Anything smelling off or leaking juice into other packages: discard it. ### No thermometer in the freezer Without a thermometer, FDA asks you to check each package. A package still carrying ice crystals, or reading 40°F or colder, goes back in the freezer or into the pan. A package that has gone soft all the way through and feels like cool tap water is the one to throw out once it has been above 40°F for 2 hours or more. Source: [FDA — Food and Water Safety During Power Outages and Floods](https://www.fda.gov/food/buy-store-serve-safe-food/food-and-water-safety-during-power-outages-and-floods) — A full freezer holds about 48 hours (24 half full) with the door closed; 50 pounds of dry ice keeps an 18 cubic foot full freezer cold two days; at 40°F or below or with ice crystals food may be refrozen or cooked; this page states 4 hours above 40°F for discarding perishables; [FDA — Power Outages: Key Tips for Consumers About Food Safety](https://www.fda.gov/food/food-safety-during-emergencies/power-outages-key-tips-consumers-about-food-safety) — Check each package if no thermometer was kept in the freezer; discard perishable food above 40°F for two hours or more; [Frigidaire — Chest Freezer User Manual (A31283301)](https://frigidaire.bynder.com/asset/ee34c64d-380c-4b79-840f-d5ccd0a253b2/A31283301en-US-pdf.pdf) — Keep the lid closed and frozen food stays frozen at least 120 hours on that model; wear gloves with dry ice; the display shows HI when the temperature exceeds the set level ## Why this site uses 2 hours, not 4 FDA's own pages give two figures. Its guidance on power outages and floods says to discard perishables held above 40°F for 4 hours or more, while its key tips for consumers say 2 hours or more. Both are official; we print the stricter one everywhere on this site so the advice never depends on which page someone found first. The difference matters most for thawed meat, poultry, seafood and cooked leftovers, which are the perishables both pages name. In practice, a freezer that was shut and full rarely reaches that point within a day, which is why the closed lid does more for your food than anything else in this guide. Source: [FDA — Food and Water Safety During Power Outages and Floods](https://www.fda.gov/food/buy-store-serve-safe-food/food-and-water-safety-during-power-outages-and-floods) — A full freezer holds about 48 hours (24 half full) with the door closed; 50 pounds of dry ice keeps an 18 cubic foot full freezer cold two days; at 40°F or below or with ice crystals food may be refrozen or cooked; this page states 4 hours above 40°F for discarding perishables; [FDA — Power Outages: Key Tips for Consumers About Food Safety](https://www.fda.gov/food/food-safety-during-emergencies/power-outages-key-tips-consumers-about-food-safety) — Check each package if no thermometer was kept in the freezer; discard perishable food above 40°F for two hours or more ## Checking the freezer itself once it is running A freezer that comes back after an outage should hum within a few minutes and pull the cabinet back toward 0°F over the next several hours. A heavily loaded chest can take most of a day to recover fully, because it is cooling food as well as air. Leave the setting alone during that time and read the thermometer again in the evening. Outages end with surges, and surges end some compressor relays and control boards. If the freezer stays silent, clicks every few minutes without starting, or restarts with a code on the display, note it and look it up on our error codes pages before resetting anything. ## Where to stop Book a visit if the freezer does not start once power is back, trips the breaker when it tries, smells of hot plastic, or is still above 10°F the next morning with the load untouched. Do not open the back panel or the compressor cover to look for a burnt part: the wiring there carries line voltage. Written by [FreezerRepair.center technical team](https://freezerrepair.center/authors/technical-team/). Freezer technicians who write from what they measure at the cabinet, the evaporator and the compressor, checked against each maker's manuals. Sources: [FDA — Food and Water Safety During Power Outages and Floods](https://www.fda.gov/food/buy-store-serve-safe-food/food-and-water-safety-during-power-outages-and-floods) · [FDA — Power Outages: Key Tips for Consumers About Food Safety](https://www.fda.gov/food/food-safety-during-emergencies/power-outages-key-tips-consumers-about-food-safety) · [USDA FSIS — Freezing and Food Safety](https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/freezing-and-food-safety) · [ENERGY STAR — Freezers](https://www.energystar.gov/products/freezers) · [Frigidaire — Chest Freezer User Manual (A31283301)](https://frigidaire.bynder.com/asset/ee34c64d-380c-4b79-840f-d5ccd0a253b2/A31283301en-US-pdf.pdf) ## Step by step. Five steps, in the order worth doing them. 01 ### Note the time Write down when the power went off and tape a do-not-open note to the lid or door. 02 ### Hold the cold Push the load together and add dry ice, block ice or bagged ice if the outage looks like it will run past a day. 03 ### Read the thermometer When power returns, check the appliance thermometer before opening anything else, and photograph any alert on the display. 04 ### Sort by package Keep anything icy or at 40°F or colder; discard perishables that sat above 40°F for 2 hours or more. 05 ### Confirm the recovery Check that the cabinet is back near 0°F within the day before restocking with fresh purchases. For the heart of your home. ## Questions owners ask. ### The freezer was only half full. Do I have 24 hours or less? FDA's figure for a half-full freezer is about 24 hours with the door shut. Frequent opening, a warm garage or a small, sparsely filled unit can shorten that, so the thermometer decides, not the clock. ### Can I refreeze meat that thawed but still feels cold? Yes, if it still has ice crystals or reads 40°F or colder. Expect a softer texture after it thaws the second time; the safety is fine, the quality drops a little. ### Is it worth buying dry ice for a small upright? For an outage expected to last beyond a day, yes. Place it on top of the food, keep the room ventilated, and never seal dry ice in an airtight container or touch it bare-handed. ### Why does the display read 0°F when some food feels soft? The display reports air near the sensor right now, and air recovers far faster than dense packages do. Trust a thermometer placed between packages, or the packages themselves. ## The problems behind it. Each has a page of its own: what it usually means and the causes in the order worth checking. [All 17 problems](https://freezerrepair.center/problems/) Food at risk now ### Freezer Warming Up With Food Inside 5 causes, cheapest first Problem ### Freezer Won't Turn On 5 causes, cheapest first Problem ### Freezer Alarm Beeping 5 causes, cheapest first Food at risk now ### Freezer Keeps Tripping the Breaker 5 causes, cheapest first ## When it needs a technician. The repairs on the right are where this guide ends when the checks do not settle it. ### Freezer diagnostic visit A visit that starts with the food and the room the freezer stands in, then works through the seal, the airflow, the defrost and the compressor until one part is named. ### Freezer compressor and start relay repair Getting a freezer's compressor running again, from the small start relay and overload that fail most often to the compressor itself when it will not pump. ### Freezer control board and alarm repair Repairing the electronic control, display, door switch and sensors that run a modern freezer, including a temperature alarm that sounds without reason or never sounds at all. ## More in food safety and power. How long frozen food lasts with the power out, what may be refrozen and what must go, and what to do when a freezer smells of burning or keeps tripping its breaker. [The whole section](https://freezerrepair.center/guides/safety-and-food/) Keeping the food and the wiring safe ### Refreezing Thawed Food: When It Is Safe and What It Costs in Texture Refrigerator, cold-water and microwave thawing, the 2-hour and 90°F limits, ice crystals after a freezer stopped, store-bought frozen meat and the quality lost each time. Keeping the food and the wiring safe ### Chest Freezer Child Safety: Locks, Keys, Old Latches and Disposal Why a closed chest is dangerous, CPSC's lid test for old latch freezers, where the lock key belongs, an idle freezer with its lid propped, and removing the lid before it leaves. Guides ### All 18 guides Six sections, by what you are trying to find out. --- **[Read on the site: Freezer Food After a Power Outage: What Stays, What Refreezes, What Goes](https://freezerrepair.center/guides/freezer-food-after-a-power-outage/)** **[Book a visit with FreezerRepair.center](https://freezerrepair.center/schedule/)**