Whirlpool W10849525 Refrigerator Rail Mullion | Genuine OEM Replacement Part (Open box)

Whirlpool W10849525 Refrigerator Rail Mullion | Genuine OEM Replacement Part (Open box).

Whirlpool W10849525 Refrigerator Rail Mullion

Genuine OEM French Door Articulating Rail Mullion Sealing Bar Assembly

📝 Product Overview

The Whirlpool W10849525 is a factory-original replacement articulating rail mullion assembly. Mounted vertically along the inner edge of the left fresh food door on select French door refrigerators, this genuine OEM part flips inward as the door closes to create an airtight seal between the two french doors.

As an Authentic Whirlpool Component , this rail mullion features an internal low-wattage heating element designed to prevent moisture condensation, sweat, and frost accumulation along the center door seam. Choosing a genuine factory replacement mullion guarantees exact guide-track hinge alignment, smooth door closure, and a proper thermal seal to keep humid room air out of your fresh food compartment.

🔍 Signs Your Refrigerator Rail Mullion Needs Replacement

• Doors Hit or Catch When Closing: Snapped mounting hinges, worn guide pins, or broken internal springs prevent the mullion flap from rotating smoothly into the cabinet guide track.
• Condensation or Sweating Between French Doors: A burnt-out internal mullion heater element allows moisture to accumulate and drip along the center door gasket seam.
• Warm Fresh Food Section / Excessive Frost Build-Up: A cracked or misaligned mullion flap leaves a gap between the doors, allowing warm, humid room air to continuously bleed into the cabinet.
• Torn or Warped Center Gasket Flap: Cracks, tears, or warping along the plastic housing prevent a tight seal against the opposite door gasket.

🔧 Technical Specifications

• Part Number: W10849525 (Replaces AP6003932, 4455113, PS11735495)
• Part Type: Refrigerator French Door Articulating Rail Mullion Sealing Bar
• Features: Integrated Condensation Anti-Sweat Heater & Articulating Hinge System
• Condition: Brand New, Genuine Whirlpool OEM Replacement Part
• Brand Compatibility: Precision engineered to fit select Whirlpool, KitchenAid, Maytag, Jenn-Air, and Amana refrigerators.

📦 Professional Installation, Care & Maintenance Tips

⚠️ CRITICAL SAFETY WARNING: ELECTRICAL ISOLATION REQUIRED! Replacing a rail mullion assembly involves disconnecting the wire harness feeding the internal anti-sweat heater circuit. **Always unplug the refrigerator power cord from the wall outlet or trip the main breaker before starting service**. Wear protective safety glasses throughout installation. Pro Tip: Support Mullion Weight & Hand-Drive Hinge Screws! Accessing the mullion requires opening the left fresh food door. **Take clear smartphone reference photos of the upper and lower hinge mounts and wire harness cover before unhooking anything**. Remove the small plastic harness access cover plate, unclip the wiring connector, and support the weight of the mullion while removing the mounting hinge screws. When securing your fresh **Whirlpool W10849525** rail mullion assembly, align the upper guide pin with the cabinet top track. **Always hand-tighten hinge mounting screws using standard hand tools**—over-tightening with power drivers can strip screw holes or crack plastic mounting brackets. Installation Steps: Isolate electrical power to the appliance. Open the left fresh food door, remove the wire harness cover plate, and disconnect the electrical plug. Unbolt the upper and lower mounting hinge screws while supporting the old mullion, then set it aside. Position your new genuine **Whirlpool W10849525** rail mullion onto the door frame mounts, hand-tighten securing screws, reconnect the wiring harness plug, snap the cover plate back into place, restore power, and test smooth door closure and seal alignment.

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Specifications

• Type: Mullion
• Country of Origin: United States

Condition: Open box