How to Fix Kenmore Refrigerator Error F18

Written by

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

Error Code: Refrigerator Difficulty: Easy

Problem: Secondary freezer sensor fault (dual-sensor freezer models)

⚖️ Repair Decision

✅ WORTH FIXING

Parts under $100

How to Fix Refrigerator Error

UNPLUG unit.
Remove evaporator cover panel in freezer.
Locate secondary thermistor (may be mounted on evaporator coil opposite primary sensor or in freezer air stream).
Disconnect connector and test resistance.
Replace if open/shorted or reading outside specification.
Position new sensor in identical location to original.
Secure properly to prevent movement during defrost cycles.
Restore power and allow 4 hours for temperature stabilization.

OEM Part #: WPW10138629

Estimated Market Price: $25-45

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

Get the ‘Secret Service Mode’ Cheat Sheet for your Kenmore model. Includes an easy-to-read list of every error code and quick diagnostic tips.

✅ Join 15,000+ DIYers • Instant PDF Download

Appliance Type

Appliance Age

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

Is it under warranty?

More options (for a better recommendation)

Brand

Your DIY Skill Level

EPA Section 608 Certified Technician with 18+ years experience.