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HomeRepair HelpSamsung Refrigerator RepairSamsung Refrigerator has frost or moisture buildup around the door Repair
Samsung Refrigerator has frost or moisture buildup around the door
Frost or moisture collecting on the mullion or around the refrigerator doors is usually a sign that warm, humid air is getting into the seam or the small heater that keeps the mullion flap warm has failed. The most likely cause is a defective mullion heater; test it for electrical continuity with a multimeter and replace it if it shows no continuity. If the heater checks out, inspect the door support and door guide for damage or misalignment that prevents the flap from seating properly. Also check the door gasket for twists, tears, or gaps that will let warm air in and cause frost or even a fridge that feels warm while the freezer stays cold. Less commonly, frost follows when a door has been left open for several hours and will clear after a defrost cycle. If you suspect the problem is a door not closing or a fridge door not sealing, replace the worn part to restore the seal. Enter your model number on RepairClinic.com to find the exact replacement part that fits your refrigerator.
01 - Samsung Refrigerator Mullion Heater
A defective mullion heater flap may not be able to heat up periodically to melt any frost or moisture that forms on the flap due to increases in room humidity. You can use a multimeter to test the mullion heater for electrical continuity to determine if the component is working. If the mullion heater has no electrical continuity you should replace it with a new one.
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Common
02 - Samsung Refrigerator Door Support
If the mullion heater flap has frost or moisture buildup, it's possible the door suport is damaged or misaligned and not allowing the flap to form a tight seal between the refrigerator doors. Inspect the door support for wear or damage and replace if necessary.
Common
03 - Samsung Refrigerator Door Guide
If the mullion heater flap has frost or moisture buildup, it's possible the door guide is damaged or misaligned and not allowing the flap to form a tight seal between the refrigerator doors. Inspect the door guide for wear or damage and replace if necessary.
Common
04 - Samsung Refrigerator Door Gasket
A door gasket should form an airtight seal around the appliance's frame to keep the cold air in and the warm air out. If the door gasket is twisted or torn, gaps can form that will allow warm air in, resulting in the freezer not freezing properly. Inspect the door gasket for any damage and replace with a new one if necessary.
Common
05 - Refrigerator or freezer door left open
If the freezer or refrigerator door was left open for an extended period of time (more than 4 hours), frost may have accumulated on the food and around the door opening. The frost should go away after the door is closed and the refrigerator goes through a defrost cycle.
Common
Frequently Asked Questions
My fridge not cooling but freezer works — could frost around the doors be the cause?
Refrigerator not cooling — how can a bad door gasket or misaligned door cause this?
Freezer cold but fridge warm — how do I check the mullion heater?
Refrigerator door not closing properly — what parts should I inspect?
How do I enter my model number or part number on RepairClinic.com to find the right replacement part?
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