The safest way to defrost food is in the fridge Allow at least 24 hours for every 2-2.5 kg (4-5 lbs). Once the food has thawed, cook or eat it within 24 hours. Do not refreeze it. It is not safe to defrost at room temperature.
DO Turn off the refrigerator / freezer. Keeping it on will only waste energy and slow down the defrosting process.
If the ice isn't very thick, it might only take as little as 2 hours for it to melt away. If it's glacier-like, you could be looking as much as 24 hours with the fridge freezer off and the doors open. If it's only light ice, we've got some suggestions that will help you get your defrost done fast.
If food isn't pre-portioned, transfer the desired portion into a zip-top bag. Submerge the bag in cold water, ensuring never to use hot water. Replace the water every 30 minutes with fresh, cold water. This ensures it maintains an optimal environment for safe and rapid thawing.
Follow the manufacturer's defrosting instructions. Food should be left out at room temperature for the shortest time possible. Ideally, defrost these foods in the fridge. Foods will defrost quite quickly at room temperature, but harmful bacteria could grow in food if it gets too warm while defrosting.
The room temperature air will help the ice melt at a slightly faster pace. Another popular method for defrosting a freezer quickly is to use steam to melt the ice. Fill pots, pans or mixing bowls with steaming hot water, then carefully place them in your freezer on top of thickly folded towels.
Wait for the freezer to defrost. This can take several hours. Do not try and speed up the process and do not use sharp objects to remove ice. Whilst the freezer is defrosting, quickly clean the appliance's interior using a damp cloth.
Let the ice melt
The easiest way to defrost a freezer is to simply let the ice melt on its own. After you unplug your appliance, leave the door open and wait for the ice to melt on its own.
So, Can an Empty Freezer Get Cold? Yes, an empty freezer can get cold, but it's not as efficient. When it's empty, there's nothing to help hold the cold. Think of it like this: when you open the door, all the cold air rushes out, and the freezer has to work harder to cool down again.
To do this, place bowls of boiling water onto each shelf or into each compartment of your freezer. The heat and steam from this boiling water should be able to speed up the defrosting process in just a few minutes, so make sure you have some towels handy to wipe up the water.
Avoid the temptation to use boiling water straight from your kettle — the risk of a serious scold just isn't worth the potential reward. Also, place each bowl onto a thick towel. Excess heat might cause serious damage to the inner surfaces of your freezer. Hot water cools very quickly inside a cold freezer.
The quickest way is to empty the freezer into a large cooler and blow warm air into the empty freezer with a box fan. It will be at least 4–6 hours before the empty freezer can be reloaded but the unload and reload are fairly quick. It also allows any frost on the food packages to fall/melt off.
Placing bowls/pans of hot water on the floor and shelves of the freezer and close the door. The steam will help defrost the ice. Replace hot bowls/pans every 10-15 minutes or as needed as the water cools.
While most refrigerators, freezers, and refrigerator-freezers on the market today have automatic defrost controls, some models are available with manual defrost. Automatic defrost refrigerators work by heating the interior refrigerator coils at regular intervals.
You should leave your fridge/fridge freezer to settle for at least 4 hours. Once 4 hours have passed, you can plug your appliance in. When doing so, make sure that the thermostat control is set to on. Before placing food into the appliance, allow your fridge some time to cool down to temperatures safe for food storage.
How long does it take to defrost a freezer? Depending on the freezer you have, and how much frost/ice build-up there is, defrosting your freezer can take anything between 2 hours and 24 hours to defrost naturally. That time can be cut if you use any of the methods mentioned above to help thaw the ice.
No. Defrosted food should not be refrozen unless first cooked to over 75 °C and should not be refrozen more than once following this cooking step. However, many manufacturers will put a statement on their foods along the lines of 'This product has been previously frozen but is suitable for home freezing.
Switch off and unplug the freezer. Leave the door open until the solid ice starts to melt away from the walls and the top of your freezer. Sit a bowl of hot water on a tea towel in the freezer to speed up the process. Replace this as and when it cools.
Never thaw food in a garage, basement, car, dishwasher, plastic garbage bag, in hot water, out on the kitchen counter, outdoors or on the porch. These methods can leave your foods unsafe to eat. For safe thawing methods, see: The Big Thaw.
To defrost a freezer without turning it off, first remove all the items from your freezer, and pack them tightly into the fridge, being careful to shut the door properly. Then cover the floor with towels to soak up excess water that comes from the freezer during the defrosting process.
Defrost in cold water
Ensure your food is well wrapped and completely sealed – a plastic bag is great – with as little air inside as possible, then place in a sink, or large bowl and submerge in plenty of very cold tap water. Drain every 20 minutes and refill with more cold water.
If your freezer won't start, you may have a defective start capacitor. This device is used to help energize the compressor start windings until the unit is running. If the capacitor is defective, the compressor might hum but may not start.
It's not possible to safely defrost your freezer while leaving your food inside. This is because the frozen food will thaw and its temperature could enter the 'danger zone'. Bacteria and moulds are not killed when food is frozen, they become dormant.