The lights go out, the fridge goes quiet, and the first question is always the same: how long will the food last? The second question comes a few hours later, when the power is back and the fridge either hums back to life or doesn’t. Winter storms, ice storms and summer heat waves all knock out power in Toronto from time to time, so it’s worth knowing both answers before you need them.
This guide covers the official food safety timelines from Health Canada, what to do while the power is out, what’s normal once it comes back, and what to check if your fridge won’t start cooling again.
How Long Is Food Safe in a Fridge and Freezer Without Power?
According to Health Canada’s guidance on food safety in an emergency, if you keep the doors closed:
- An unopened refrigerator will keep food cold for about 4 hours.
- A full freezer will keep food frozen for about 48 hours.
- A half-full freezer will keep food frozen for about 24 hours.
Those are guidelines, not guarantees. A fridge that gets opened a few times, sits in a warm kitchen or was already running warm before the outage will lose its cold faster. That’s why a thermometer matters more than the clock. Health Canada recommends keeping your fridge at or below 4°C (40°F) and your freezer at or below -18°C (0°F). A cheap appliance thermometer on a fridge shelf and one in the freezer tells you exactly where you stand when the power comes back.
What to Do During the Outage
- Keep the doors closed. This is the single most effective thing you can do. Every opening lets cold air spill out. Only open the doors when you really need to, and check the thermometers while you’re there.
- Group frozen food together. Packed food stays cold longer than scattered items, which is why a full freezer outlasts a half-full one.
- Move food if the outage will be long. If you know the power will be out for a long time, Health Canada suggests asking a friend or family member who has power to store your food.
- Don’t put food outside, even in winter. Health Canada specifically warns against it: animals can get into it, and the sun can thaw frozen food even when it’s very cold out. A cooler with ice is a safer option.
- Unplug the fridge or switch off its breaker if you’re worried about surges. When power is restored, voltage can fluctuate. Unplugging sensitive appliances during the outage and plugging them back in once the power has been steady for a few minutes is a reasonable precaution.
Deciding What to Keep Afterwards
Health Canada’s guidance after an outage is straightforward:
- Food that still contains ice crystals or feels refrigerator-cold can be refrozen.
- Throw away food that has been at room temperature for 2 or more hours.
- Throw away anything with an unusual colour or odour, but remember that food contaminated with bacteria doesn’t always look or smell spoiled.
- If raw meat juices leaked while thawing, clean the area with soap and hot water and then sanitize it.
- When in doubt, throw it out.
After the Power Returns: What’s Normal
Once the power is back, your fridge has a lot of work to do. Here’s what you can expect from a healthy fridge:
- A short delay before it starts. Many fridges have a built-in compressor delay after power is restored. It can be a few minutes before you hear the compressor kick in, so don’t panic if it’s quiet at first.
- Long, continuous running. A warm fridge will run for a long time without cycling off. That’s normal while it pulls the temperature back down.
- Several hours to fully recover. It can take a number of hours for both compartments to get back to their normal temperatures, especially if the doors were opened or the fridge is full of warm food. Avoid loading in lots of new groceries until it’s cold again.
- Beeping or a flashing display. Many fridges sound a temperature alarm or show a high-temperature warning after an outage because the inside got warm. On most models, pressing the alarm or a control button silences it, and the warning clears once the temperature recovers. Some models also reset their temperature settings or show a power-failure indicator, so check that your settings are still where you want them.
- Ice maker catching up. The ice maker may take a while to produce ice again, and the first batch can be small or cloudy. Some people throw away the first batch or two after an outage, particularly if the ice partly melted and refroze.
Fridge Won’t Restart or Isn’t Cooling After a Power Outage
If the power has been back for a while and the fridge is still silent or warm, work through these checks in order. Most of them are free and safe to do yourself.
1. Check That It’s Getting Power
- Look inside. Is the interior light on? Is the display lit? If nothing at all is working, the fridge isn’t getting power.
- Check the breaker panel. Power restorations sometimes trip breakers. Look for a breaker that’s in the middle or off position, switch it fully off and then back on.
- Check for a tripped GFCI outlet. If the fridge is plugged into an outlet with Test and Reset buttons, or into a circuit protected by one elsewhere (common in basements and garages), press Reset. A GFCI can trip when power comes back.
- Check the plug and outlet. Make sure the plug is fully seated. Test the outlet with a lamp or phone charger. If the outlet is dead and the breaker is fine, that’s a question for an electrician rather than an appliance technician.
2. Lights On, but No Cooling
If the light and display work but the fridge isn’t getting cold, the fridge has power but something isn’t running.
- Wait out the compressor delay. Give it 10 to 15 minutes before deciding something is wrong.
- Check the settings. Some fridges come back from an outage in a different mode, or with demo, vacation or sabbath mode enabled. Look at the display and the manual for your model. Demo or showroom mode keeps the lights and display working while cooling is turned off.
- Try a reset. Unplug the fridge (or switch off its breaker) for a few minutes, then plug it back in. This can clear a control board that got confused when the power flickered.
- Listen for the fans. With the freezer door open, you can often hear the evaporator fan, or feel air coming from the vents. Some fans stop when the door opens, so pressing the door switch with your finger can help.
- Feel for warmth near the bottom. When the compressor is running, the area around the bottom back of the fridge usually feels warm and you’ll hear a steady hum. Silence there, combined with a lit display, can point to a compressor, start relay or control problem.
If the fridge section is warm but the freezer is cold, that’s a different pattern with its own causes. Our guide to a fridge not cooling while the freezer works walks through it.
3. Clicking, Humming, Then Nothing
If you hear the compressor try to start with a click, a short hum, and then it shuts off, and this repeats every few minutes, the compressor isn’t starting properly. The usual suspects are the start relay or overload, which can fail at any time but often show up when the fridge restarts after an outage. These parts sit behind the rear access panel near the compressor, alongside live wiring, so testing and replacing them is a technician job.
4. Display Dead or Acting Strangely: Surge Damage
Modern fridges rely on electronic control boards to run the compressor, fans, defrost system and dispenser. When the power comes back, a surge or a series of quick on-off flickers can damage those electronics. Signs include:
- A blank or garbled display, even though the outlet works.
- Buttons that don’t respond.
- An error code that wasn’t there before the outage.
- Some parts working (like the light) while others (like the fans or compressor) don’t.
- A burning smell from the back or bottom of the fridge.
If you smell burning, unplug the fridge or switch off the breaker right away and don’t plug it back in until it’s been checked. A damaged control board or wiring can be diagnosed and replaced, and it’s often the fix that gets a fridge running after a surge, but it needs proper testing to confirm which part failed.
5. It Runs, but Never Gets Fully Cold
If the fridge is running but hasn’t reached normal temperature after a full day, the outage may simply have revealed a problem that was already developing. Dirty condenser coils, a struggling fan or a frosted-over evaporator all make it harder for a fridge to recover. If the freezer has built up heavy frost, our article on a freezer frosting up explains what that means. And if one compartment swings too cold once it recovers, see our tips for a fridge that’s too cold.
Safety Notes
- Always unplug the fridge or switch off the breaker before removing any panel or touching anything behind the fridge.
- Don’t run a fridge from a generator through an undersized extension cord, and never run a generator indoors, in a garage or near windows.
- If there’s water on the floor from melting ice, clean it up before working near the outlet.
- Don’t keep resetting a fridge that smells hot or keeps tripping a breaker. That’s a sign of an electrical fault.
Protecting Your Fridge Next Time
- Keep thermometers in the fridge and freezer so you can check temperatures quickly after an outage instead of guessing.
- Keep the freezer reasonably full. Containers of water frozen solid fill empty space and help it hold its cold longer.
- Unplug during long outages and plug back in once the power has been steady for a few minutes.
- Ask an electrician about surge protection. A whole-home surge protector installed at your panel is one option to discuss with a licensed electrician. If you use a plug-in surge protector, check the fridge manufacturer’s instructions first, since some don’t recommend them for refrigerators.
- Keep the condenser coils clean. A fridge with clean coils recovers faster after any warm-up.
When to Call a Technician
Call a pro if:
- The fridge has power (light and display on) but isn’t cooling after 24 hours.
- The compressor clicks and hums but won’t keep running.
- The display is blank, scrambled or showing a new error code after the outage.
- You notice a burning smell or the fridge keeps tripping its breaker.
- One compartment cools and the other doesn’t.
Our technicians diagnose and repair control boards, compressor start components, fans and defrost systems on most major fridge brands. Learn more about our refrigerator repair service. We serve homes across Toronto, North York, Scarborough and Etobicoke.
Fridge still not cooling after the power came back? Give I-Fix Appliance Repair a call or book online, and we’ll get it running again before more food goes to waste.