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HomeRepair HelpDacor Refrigerator RepairDacor Refrigerator has frost or moisture buildup around the door Repair
Dacor Refrigerator has frost or moisture buildup around the door
If you’re seeing frost or moisture collecting along the center mullion between the doors, the most likely culprit is a failed mullion heater flap that no longer warms to melt condensation. Start there: a multimeter continuity check will tell you if the mullion heater is open and needs replacement. Next likely causes are mechanical: a damaged or misaligned door support or door guide can prevent the flap from seating tightly, and worn, twisted, or torn door gaskets will let warm, humid room air in and cause frost buildup. Less likely but still possible is that a door was left open for several hours, which can temporarily coat the mullion with frost until the next defrost cycle. This is often a fridge door not sealing issue, so check hinges and seals as part of the diagnosis. If you need parts, enter your model number on RepairClinic.com to find the exact replacement mullion heater, door support, guide, or gasket that fits your refrigerator.
01 - Dacor 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 - Dacor 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 - Dacor 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 - Dacor 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
Why is there frost or moisture buildup around my refrigerator door?
The freezer is cold but the fridge is warm; could frost on the mullion flap cause that?
How do I test a mullion heater to know if it needs replacement?
Can a damaged door gasket or misaligned door parts cause frost buildup, and how do I fix it?
How do I find and buy the correct mullion heater or door gasket for my refrigerator on RepairClinic.com?
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