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The defrost timer controls the automatic defrost cycle in your refrigerator — it periodically switches the refrigerator from cooling mode into a short defrost cycle that melts frost off the evaporator coils, then switches back to cooling. When the timer fails and sticks in cooling mode, frost accumulates on the evaporator coils until they are completely blocked with ice, airflow stops, and the refrigerator section warms up while the freezer stays cold. When the timer sticks in defrost mode, the compressor never runs and the entire refrigerator warms up. The R0131577 Whirlpool OEM Defrost Timer Kit is the factory-specified replacement that restores automatic, timed defrost cycling.
✓ Symptoms This Fixes
- Thick frost or ice buildup on the back wall of the freezer compartment
- Evaporator coils completely blocked with ice — no airflow through the vents
- Refrigerator section not cooling while freezer remains cold
- Refrigerator and freezer both warming up (timer stuck in defrost mode)
- Defrost cycle never running — frost accumulates continuously
- Defrost cycle running continuously — compressor never kicks on
- Food in the refrigerator section spoiling faster than normal
- Loud fan noise from the freezer as the fan struggles against ice-blocked coils
✓ Part Details
- OEM Part Number: R0131577
- Brand: Whirlpool OEM
- Component: Refrigerator defrost timer kit
- Compatible Brands: Whirlpool, Maytag, Amana
- Genuine OEM: Yes — factory-specified replacement
Pro Tip — Manually Advance the Timer to Confirm It Is the Fault Before Ordering:
Before ordering the defrost timer, confirm it is the failed component and not the defrost heater or defrost thermostat. Locate the timer (typically behind the lower front grille or inside the refrigerator compartment) and use a flathead screwdriver to manually advance the timer dial clockwise until you hear a click — this forces the refrigerator into defrost mode. If the defrost heater comes on and the frost melts, the heater and thermostat are good and the timer is the fault (it was stuck in cooling mode). If the heater does not come on after advancing the timer, test the defrost heater and thermostat for continuity before ordering the timer — a failed heater or open thermostat will cause the same frost buildup symptoms and the timer may be functioning correctly.
Before ordering the defrost timer, confirm it is the failed component and not the defrost heater or defrost thermostat. Locate the timer (typically behind the lower front grille or inside the refrigerator compartment) and use a flathead screwdriver to manually advance the timer dial clockwise until you hear a click — this forces the refrigerator into defrost mode. If the defrost heater comes on and the frost melts, the heater and thermostat are good and the timer is the fault (it was stuck in cooling mode). If the heater does not come on after advancing the timer, test the defrost heater and thermostat for continuity before ordering the timer — a failed heater or open thermostat will cause the same frost buildup symptoms and the timer may be functioning correctly.
✓ Installation Notes
- Skill Level: Beginner to Intermediate
- Estimated Time: 15–30 minutes
- Key Steps: Unplug refrigerator → Locate the defrost timer (behind lower front grille or inside refrigerator compartment depending on model) → Note the wiring harness connection and timer orientation before disconnecting → Disconnect the wiring harness from the old timer → Remove mounting screws or clips → Note the position of the timer dial before removing — set the new timer dial to the same position → Mount new timer and reconnect harness → Restore power → Manually advance the timer to confirm defrost cycle initiates correctly → Allow 24 hours for the refrigerator to return to normal operating temperatures
- Safety: Always unplug the refrigerator before beginning. If the evaporator coils are heavily iced over, manually defrost the freezer with a hair dryer or by leaving the doors open before installing the new timer — do not chip ice off the coils.
✓ Compatible Models
Compatible with select Whirlpool, Maytag, and Amana refrigerators. Contact us with your full model number to confirm fit before ordering.
✓ Why XPart Supply
- Canadian Business Since 1996 — 30 Years of Appliance Parts Expertise
- Guaranteed Fit — OEM parts matched to your exact model
- Fast Canada-Wide Shipping
- Trusted by DIYers and Appliance Technicians Across Canada
- Expert support to confirm compatibility before you order
✓ Frequently Asked Questions
How do I know if it’s the defrost timer and not the heater or thermostat?
Manually advance the timer dial clockwise with a flathead screwdriver until you hear a click. If the defrost heater comes on and begins melting frost, the heater and thermostat are good — the timer was stuck in cooling mode and is the correct part to replace. If the heater does not come on after advancing the timer, test the defrost heater and thermostat for continuity — one of those components has failed instead.
My freezer is cold but the fridge section is warm — is this the defrost timer?
This is the classic symptom of a defrost timer stuck in cooling mode — frost has built up on the evaporator coils and blocked airflow to the refrigerator section while the freezer stays cold because it is directly adjacent to the coils. Manually defrost the freezer first to confirm — if the refrigerator section cools normally after defrosting, the defrost timer (or heater/thermostat) has failed.
Does XPart Supply ship refrigerator parts across Canada?
Yes! XPart Supply ships OEM and aftermarket refrigerator parts Canada-wide with fast, reliable shipping. We've been serving Canadian appliance repair customers since 1996 and offer guaranteed fit on all parts. Contact us if you need help confirming compatibility with your model.
✓ Model-Specific Repair Pages
✅Compatibility & Cross Reference
Not sure about your model number? Call 1-877-899-7278 and we’ll help you confirm. All brand names are the property of their respective owners and are used for compatibility reference only.
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