Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Price Match Guarantee
In-stock parts ship the same day
365-Day Return Policy
Price Match GuaranteeChoose Product
Identify Problem
03
Find Solutions
HomeRepair HelpArctic Air Refrigerator RepairArctic Air Refrigerator has frost or moisture buildup around the door Repair
Arctic Air Refrigerator has frost or moisture buildup around the door
If frost or water keeps forming along the mullion or around your refrigerator doors, the most likely culprit is a failed mullion heater flap that is not warming enough to melt condensation; you can check that heater for electrical continuity with a multimeter and replace it if it reads open. After that, inspect the door support and door guide for damage or misalignment that prevents the flap from seating tightly, then examine the door gasket for twists, tears, or gaps that let humid air in. High room humidity or a door accidentally left open for several hours will also cause frost build up until the next defrost cycle, so rule those out before ordering parts. Check hinges, latch alignment, and the gasket seating surface while you’re at it; often a simple adjustment or a new gasket fixes a fridge door not sealing problem and ends recurring frost. If you need the correct replacement part, enter your model number on RepairClinic.com to find the exact mullion heater, door support, guide, or gasket that fits your refrigerator.
01 - Arctic Air 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.
Enter model number to search for the required part specific to your product
Common
02 - Arctic Air 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 - Arctic Air 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 - Arctic Air 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
Refrigerator door not closing properly: could a bad gasket or door support cause frost or moisture around the door?
Freezer cold but fridge warm: can the mullion heater cause the freezer to freeze while the fridge stays warm?
How do I test the mullion heater with a multimeter?
My refrigerator door was left open for a few hours; will the frost go away on its own?
How do I enter my model number or part number on RepairClinic.com to find the correct replacement part?
Shop by Arctic Air Refrigerator Parts
Shop by Popular Arctic Air Refrigerator Models
Our Story
Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.
About Repair Clinic
© 2026 RepairClinic.com