How to Test If Your Fridge Door Seal Is Working Properly
A damaged or worn fridge door seal (also called a gasket) can significantly increase your electricity bill and reduce the life of your compressor. Cold air leaks out, the compressor runs constantly trying to maintain temperature, and food may not be kept at a safe temperature. Here is how to test whether your fridge seal is working properly.
Why Door Seals Matter
The door seal creates an airtight barrier that keeps cold air in and warm air out. When the seal fails — whether due to cracking, warping, food build-up or physical damage — the fridge works much harder to maintain its set temperature. Studies have shown a faulty fridge seal can increase electricity consumption by 20–30%.
How to Test Your Fridge Door Seal
Test 1: The Paper/Banknote Test
This is the most common and reliable home test.
- Take a piece of paper (a standard A4 sheet works well, or use a banknote)
- Open the fridge door and place the paper so it is half inside the fridge and half outside, then close the door
- Gently pull the paper out
- Good seal: You should feel moderate resistance pulling the paper out. The paper should not slide out easily
- Failing seal: If the paper slides out easily with little or no resistance, the seal is not creating adequate suction at that point
Repeat this test around the full perimeter of the door — top, sides and bottom — as the seal may only be failing in one section.
Test 2: The Torch/Flashlight Test
- In a dark room, place a small torch or switched-on phone flashlight inside the fridge, pointing towards the door
- Close the fridge door
- Turn off the room lights and look around the perimeter of the door for any light escaping
- Light visible from outside the door indicates a gap in the seal
Test 3: Visual Inspection
Open the fridge door and visually inspect the entire seal. Look for:
- Cracks or splits in the rubber
- Areas where the seal appears flattened or hard
- Areas where the seal has pulled away from the door
- Build-up of mould, food residue or grime (which can prevent a proper seal)
What to Do If Your Seal Is Failing
Clean the Seal First
Before assuming the seal needs replacing, clean it thoroughly. Food residue and grime on the seal or on the fridge body can prevent proper contact. Use a damp cloth and mild detergent, getting into all the folds. Dry thoroughly. Test again after cleaning — often the seal's performance improves significantly.
Try Softening the Seal
A rubber seal that has gone hard (particularly in fridges 5+ years old) can sometimes be restored by applying a thin coating of petroleum jelly (Vaseline) to the seal. This softens the rubber and can improve the seal's ability to compress and form an airtight contact.
Realign the Door
Sometimes a failing seal is caused by a misaligned door rather than a faulty seal. If your fridge door does not hang level, the seal may not compress evenly. Many fridge doors can be realigned by adjusting the lower hinge — consult your fridge's manual.
Replace the Seal
If cleaning and softening do not resolve the issue, the seal needs replacing. Fridge door seals are available from appliance spare parts suppliers. You will need your fridge's model number (usually on a sticker inside the fridge on the wall or on the bottom of the door). Many seals can be replaced by a confident DIYer.
When to Consider a New Fridge
If your fridge is more than 10–12 years old, the cost of replacing the seal plus the ongoing high electricity consumption of an old, inefficient compressor may mean a new fridge is a better investment. Modern 4–5 star fridges are significantly more energy-efficient than fridges from 10+ years ago. Oceania Appliances stocks a wide range of energy-efficient fridges. Contact us at support@oceaniaappliances.com.au or visit our Wetherill Park showroom. Open 7 days 10am–8pm.