How to Defrost a Freezer: Step-by-Step Guide for Australian Households
Manual defrost freezers (and many older fridge/freezer combos) build up ice over time. This ice accumulation reduces the freezer's efficiency, takes up usable storage space, and can eventually prevent the door from closing properly. Defrosting a freezer is a simple task that most Australian households should do once or twice a year. Here's how to do it properly.
How Often Should You Defrost?
As a general rule, defrost when ice build-up exceeds about 5–6mm thick. For most households this is once every 6–12 months. If you open the freezer frequently (which allows warm, humid air in) or live in a humid climate, it may need defrosting more often. Frost-free freezers handle this automatically and don't need manual defrosting.
What You'll Need
- Towels (several — there will be water)
- A shallow tray or baking dish
- A wooden or plastic spatula (never metal — you can damage the lining)
- An esky/cooler bag with ice to store frozen food during defrosting
- Optionally: a bowl of hot water or a hair dryer (used at a distance) to speed up melting
Step-by-Step Instructions
- Prepare your food storage: Move all frozen food into an esky with ice or ice bricks. Food will stay safe for 2–4 hours in a well-insulated esky, which is plenty of time for defrosting.
- Switch off the freezer: Turn the temperature dial to Off, or unplug from the wall. For a freezer compartment in a fridge/freezer, switch the whole appliance off.
- Open the door and wait: Leave the freezer door open and place towels on the floor in front of it. The ice will begin melting naturally. This is the safest method — it takes 1–2 hours but involves no risk of damage.
- To speed up melting: Place a bowl of hot (not boiling) water inside the freezer and close the door for 10–15 minutes. The steam speeds up the melting. Alternatively, a hair dryer held at least 20cm from the ice and kept moving will speed up the process, but keep it away from water pooling inside the freezer.
- Remove loose ice: As the ice softens and loosens, use a wooden or plastic spatula to gently break it away from the walls. Never chip at ice aggressively or use a metal implement — the freezer lining is thin and easily punctured.
- Drain or dry the inside: Use a cloth or sponge to absorb remaining water. Some freezers have a drain plug at the bottom that can be removed to let water out into the tray below — check your manual.
- Clean the inside: While the freezer is empty and defrosted, wipe down the interior with a solution of warm water and bicarbonate of soda (1 tablespoon per litre) to remove odours and any residue.
- Dry thoroughly: Dry the interior with a clean cloth before switching back on. Remaining moisture will immediately form new ice when the freezer starts up.
- Switch on and reload: Turn the freezer back on and allow it to reach operating temperature (usually 20–30 minutes) before loading food back in.
Preventing Excessive Ice Build-Up
- Don't put warm or hot food directly into the freezer — let it cool first
- Ensure the door seal is in good condition — a deteriorating seal lets warm air in constantly
- Don't leave the freezer door open longer than necessary
- Store food in well-sealed bags or containers to reduce moisture
Freezer Door Seal
A damaged or deteriorating door seal is the most common cause of rapid ice build-up. Test your seal by closing the door on a piece of paper — if the paper slides out easily, the seal isn't gripping properly and needs replacing. Door seals are inexpensive and straightforward to replace on most models.
If you're looking for a frost-free freezer that never needs manual defrosting, Oceania Appliances stocks a wide range of frost-free upright and chest freezers in new and refurbished condition with free Sydney delivery. Visit 2/14 Centre Place, Wetherill Park (open 7 days, 10am–8pm), call or WhatsApp 0422 489 492.