Samsung French Door Refrigerator Frosting Between Doors? Mullion Flapper & Heater Assembly DA97-07661C — Fix the Gap Fast

If your Samsung French door refrigerator is building up frost or ice along the center gap between the two doors, the mullion flapper and heater assembly has failed. In RF18, RF197, RF20, and RF217 series Samsung refrigerators, this mullion-rail assembly seals the gap between the left and right refrigerator doors and contains a heater element that prevents frost accumulation. When it fails, warm air infiltrates the cabinet, frost builds along the door seal channel, and the refrigerator works harder to maintain temperature — leading to higher energy use and potential food spoilage. ⚡ Common failure point in Samsung French-door refrigerators built between 2012–2018. Part DA97-07661C is the genuine Samsung OEM replacement that restores the door seal, eliminates frost buildup, and returns the refrigerator to factory efficiency.

❓ Is This the Right Part?

This is the correct fix if ALL of the following are true:

• ✔ Refrigerator powers on and cools normally
• ✔ Both freezer and fresh-food sections maintain temperature
• ✔ Door hinges and gaskets are intact and undamaged
• ✔ ONLY problem is frost or ice buildup along the center gap between the two French doors

Not sure? Send us your model number — we'll confirm before you order.

🔧 Common Symptoms

• Frost or ice forming along the center mullion strip between the two refrigerator doors
• Visible gap or air leak between the left and right French doors when closed
• Refrigerator running longer cycles than normal
• Condensation or moisture on the interior door frame near the center rail

✔ If these symptoms match, the mullion flapper and heater assembly is the most likely failed component.

✔ In most cases, replacing this assembly restores the door seal and eliminates frost buildup immediately.

📦 Part Details

• Part Number: DA97-07661C
• Type: French-door mullion-rail flapper and heater assembly — seals the gap between refrigerator doors and prevents frost accumulation
• Replaces: No verified Samsung OEM supersession — DA97-07661C is the current OEM number
• Brands: Samsung
• OEM: Genuine Samsung replacement part

⚙️ Installation

Skill Level: MODERATE — 30–45 minutes. Disconnect power before servicing. Open both French doors fully and remove any items from the door bins near the center rail. The mullion assembly clips or screws into the door frame — release the retaining clips, disconnect the heater wire harness, and reverse the process with the new assembly. Confirm the flapper seats flush and the heater connector is fully seated before restoring power.

✓ Compatible Models

Confirmed compatible with RF18HFENBSG/US-00, RF18HFENBSP/AA-00, RF18HFENBSR/AA-00, RF18HFENBSR/US-00, RF18HFENBSR/US-51, RF18HFENBSR/US-52, RF197ABPN/XAA-00, RF197ABRS/XAA-00, RF197ACPN/XAA-00, RF197ACRS/XAA-00, RF20HFENBSP/AA-00, RF20HFENBSR/AA-00, RF217ABPN/XAA-00, RF217ABRS/XAA-00, RF217ACPN/XAA-00, RF217ACRS/XAA-00. Contact us to verify your model number before ordering — fitment is revision-specific and the full model suffix must be confirmed.

💡 Pro Tip