How to Fix Maytag Refrigerator Error F3

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⚠️ Safety Warning: Appliance repair involves electricity, gas, and moving parts. Always disconnect power before working on any appliance.

Error Code: Refrigerator Difficulty: Moderate

Problem: Defrost thermistor fault – sensor monitoring evaporator temperature during defrost cycle reading out of range

⚖️ Repair Decision

⚠️ CHECK WARRANTY / AGE

$100 – $250 Range

How to Fix Refrigerator Error

Unplug unit and remove freezer rear panel to access evaporator assembly.
Locate defrost thermistor: small sensor clipped directly to evaporator tubing near defrost heater.
Disconnect harness and measure resistance at room temp: should read 8k-10kΩ.
During actual defrost cycle (initiate via service mode test #
, sensor should read ~14kΩ at 32°F evaporator temp.
If open/short circuit, replace defrost thermistor WPW10316428 (often sold with thermostat as kit).
Inspect defrost heater continuity: should read 20-50Ω. Open heater won’t trigger F3 but causes frost buildup.
If thermistor tests good but F3 persists, main control board W10868991 misreading sensor – replace board after verifying all wiring.

OEM Part #: WPW10316428

Estimated Market Price: $35-225

If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.

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Estimated repair cost (parts, or parts + labor) Most DIY parts are $50–$250. If you have a quote, use the total.

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