Why Is Ice Building Up Inside My Thetford Caravan Fridge?
Customer Question
I recently purchased a second-hand caravan and will be living in it full-time for the next few months. One issue I've noticed is with my Thetford fridge.
When I first turned it on, I had the temperature set quite high for an extended period. I've since reduced it to setting number two, but there's now a significant amount of ice building up on the aluminium cooling fins at the back of the fridge compartment.
I know I could switch the fridge off completely and let it defrost, but that would mean removing all of the food and temporarily storing it in a portable fridge freezer.
Is there an easier way to remove the ice build-up and stop it from coming back?
Expert Answer
In most cases, ice build-up inside a caravan fridge is not caused by the temperature setting itself. Instead, it's usually a sign that warm, moist air is entering the fridge through a leaking door seal.
When humid air gets inside the fridge, the moisture condenses and freezes on the cooling fins, creating the layer of ice you're seeing.
How to Check Your Fridge Door Seal
A simple test is to place a $20 note between the fridge door seal and the fridge body, then close the door.
If you can easily pull the note out without resistance, the seal is not gripping properly and is likely allowing air to leak into the fridge.
Common Solutions
1. Restore the Existing Door Seal
Over time, caravan fridge seals can become flattened or lose their shape.
Try gently warming the seal with a hair dryer, then close the door and leave it shut for several hours. The magnetic seal may reform against the fridge frame and create a better seal.
2. Replace the Door Seal
If the seal is cracked, hardened, or damaged, replacement is often the most effective long-term fix.
3. Check for Door Alignment Issues
Sometimes the fridge door itself may be slightly misaligned, preventing the seal from making full contact around the entire perimeter.
What About the Existing Ice?
Unfortunately, once the ice has formed, the only real solution is to defrost the fridge completely. While you can remove small amounts of ice manually, a full defrost will restore cooling efficiency and help you start fresh once the seal issue has been addressed.
Key Takeaway
If your caravan fridge is constantly icing up, focus on checking the door seal before adjusting temperature settings. A leaking seal allows moisture inside the fridge, which then freezes on the cooling fins and creates excessive ice build-up. Fixing the seal and performing a complete defrost will usually solve the problem and improve the fridge's overall performance.
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