Refrigerator Not Sealing Properly? Rail Mullion W10806457 – Fix Door Air Leaks Fast

If your Whirlpool, Maytag, or KitchenAid French door or bottom-mount refrigerator is losing cold air, running constantly, or showing uneven temperatures, a failed or warped rail mullion is one of the most common and overlooked causes. In most Whirlpool-platform refrigerators, the rail mullion is the vertical divider strip between the two French doors — it creates the centre seal that keeps cold air in and warm air out. When it cracks, warps, or loses its magnetic seal, the refrigerator compensates by running the compressor more frequently, driving up energy costs and accelerating wear on the sealed system. ⚡ High-failure item on WRF, MFT, and KFIS platform refrigerators. Part W10806457 is the genuine OEM replacement that restores a proper centre-door seal, directly superseding W10407225, W10407254, W10654762, and W10698199 with no modification required.

❓ Is This the Right Part?

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

• ✔ Refrigerator powers on and compressor runs normally
• ✔ Both French doors close and latch without obstruction
• ✔ Door hinges and gaskets on the outer edges have been inspected and are intact
• ✔ ONLY problem is: warm air entering at the centre seam between the two doors, visible gap or warping at the mullion strip, or refrigerator running excessively to maintain temperature

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

🔧 Common Symptoms

• Warm air or condensation forming at the centre seam between the two French doors
• Refrigerator runs constantly or compressor cycles more frequently than normal
• Visible gap, crack, or warping in the vertical divider strip between the doors
• Food spoiling faster than expected — inconsistent internal temperatures
• Frost or ice buildup inside the fresh food compartment near the door opening
• Magnetic seal at the centre of the doors feels weak or fails to hold the doors flush

✔ If these symptoms match, the rail mullion is the most likely failed component in the system.

✔ In most cases, replacing the rail mullion restores a proper centre seal and normal compressor cycling immediately.

📦 Part Details

• Part Number: W10806457
• Type: Refrigerator rail mullion — vertical centre divider strip for French door models; includes integrated magnetic seal that closes the gap between the two doors
• Replaces: W10407225, W10407254, W10654762, W10698199 (OEM direct-fit, no modification required)
• Brands: Whirlpool, Maytag, KitchenAid, Amana, Jenn-Air

⚙️ Installation

Skill Level: EASY — 15 to 30 minutes. No tools required for most models. Disconnect power at the breaker before starting. The rail mullion typically snaps or clips into the top and bottom hinge area of the French door frame — remove the old strip by pulling it free from its retaining clips, then press the new mullion into place until it seats fully. Confirm the magnetic seal closes flush against both doors before restoring power. Run the refrigerator for 30 minutes and check the centre seam for cold air retention.

✓ Compatible Models

Confirmed compatible with WRF736SDAM, WRF757SDHZ, WRF989SDAM, WRF990SLAM, MFT2976AEM, MFT2776DEM, MFT2672AEM, KFIS29BBMS, KRFF507ESS, and 150+ additional Whirlpool, Maytag, and KitchenAid French door and bottom-mount models. Contact us to verify your model number before ordering.

💡 Pro Tip

🔗 Model Repair Pages

WRF736SDAM, WRF736SDAB, WRF736SDAF, WRF736SDAW, WRF736SDAT, WRF757SDEE, WRF757SDEH, WRF757SDEM, WRF757SDHV, WRF757SDHZ, WRF767SDEM, WRF767SDHV, WRF767SDHZ, WRF989SDAB, WRF989SDAE, WRF989SDAF, WRF989SDAH, WRF989SDAM, WRF989SDAW, WRF990SLAB, WRF990SLAM, WRF990SLAW, WRF991BOOM, WRF997SDDM, MFT2574DEE, MFT2574DEH, MFT2574DEM, MFT2672AEB, MFT2672AEM, MFT2672AEW, MFT2673BEB, MFT2673BEM, MFT2673BEW, MFT2772HEZ, MFT2776DEE, MFT2776DEH, MFT2776DEM, MFT2776FEZ, MFT2778EEZ, MFT2976AEB, MFT2976AEM, MFT2976AEW, KFIS29BBBL, KFIS29BBMS, KFIS29BBWH, KFIS29PBMS, KRFF507EBL, KRFF507ESS, KRFF507EWH, KRFF507HBS, KRFF507HPS

✓ Model-Specific Repair Pages