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Customer Questions and Answers for Diffuser (Refrigerator Air Damper) by Whirlpool

4.89 (64)
By: Whirlpool
Part Number: OEM18103569
Manufacturer Part Number: W10899382

This diffuser—often called the refrigerator air damper—controls how much cold air flows from the freezer into the fresh food compartment. Replacing a worn diffuser helps restore even cooling and more stable temperatures throughout the refrigerator. What it does:

  • Opens and closes to regulate airflow from the freezer to the refrigerator
  • Helps maintain set temperatures and reduce warm spots or over-cooling
  • Common symptoms: fresh food too warm while freezer is OK, food freezing on shelves, weak airflow from upper vents, or clicking/buzzing from the diffuser area
  • Helps address frost or condensation near the diffuser outlet
What's included:
  • 1 diffuser
Install notes:
  • Disconnect power before servicing
  • Access from the refrigerator section; remove shelves/air duct covers as needed
  • Note wiring and orientation; remove mounting screws/clips and transfer any seals/insulation if present
  • After installation, restore power and allow up to 24 hours for temperatures to stabilize

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Questions & Answers

For Whirlpool Diffuser (Refrigerator Air Damper) (Part Number: OEM18103569)

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Tom for Model Number Whirlpool part #W10899382 air diffuser

I am replacing the air diffuser on my Whirlpool refrigerator. The diffuser has the connection wire and then two wires that look the same , one shorter near the part that goes into the freezer and the longer one is with the connection wires. My question is where are they supposed to go during installation. Does one go into the freezer and the other in to the refrigerator. They were both taped on the old one but I'm not sure of the placement. Thanks

Answer

Tom, Yes, The thermistors are separated and the shorter of the two is placed through the opening in the wall and must be located in the air flow, properly. The longer of the two is routed and attached near the control panel. The thermistors control the temperature in the freezer and the thermistor in the refrigerator controls the damper door to allow cold air into the refrigerator compartment. Also, you may find it easier to work from both the freezer and refrigerator compartments at the same time.

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Answered by AppliancePartsPros.com   |   Monday, September 25, 2017

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