If your GE refrigerator is building up frost, running non-stop, or failing to maintain consistent temperatures, the defrost timer is often the culprit. Part number WG03F00975 is the OEM GE defrost timer that controls your refrigerator's automatic defrost cycle — keeping the evaporator coils clear and your fridge running efficiently.

✓ Model-Specific Repair Pages

The WG03F00975 defrost timer is a direct OEM replacement that mounts in the same location as the original and uses the same wiring harness. It regulates the timing of defrost cycles — typically cycling the heater on for a set period to melt frost off the evaporator coils, then shutting off to resume normal cooling. When this timer fails, the defrost heater never activates, frost accumulates on the coils, and airflow through the refrigerator is restricted — leading to warm temperatures, excessive compressor run time, and higher energy bills.

✓ Common Symptoms Fixed

• Frost or ice buildup on the back wall of the freezer or refrigerator compartment
• Refrigerator not cooling properly or running warmer than set temperature
• Compressor running constantly without cycling off
• Excessive energy consumption or higher-than-normal utility bills
• Refrigerator not defrosting automatically

✓ Key Features & Specifications

• OEM GE part number: WG03F00975
• Direct replacement — no modifications required
• Controls automatic defrost cycle timing
• Compatible with GE top-freezer and bottom-freezer refrigerator models
• Fits models including CTS17, CTS18, A3316, A3317, and 37511 series
• Replaces 35 superseded and cross-reference part numbers

✓ Buying Options

OEM (WG03F00975): The original GE-manufactured defrost timer. Exact fit, exact specs — the same part that came in your refrigerator from the factory. Best choice when you want a guaranteed match with no guesswork.

Aftermarket replacement parts are not affiliated with, sponsored by, or endorsed by GE or any OEM manufacturer.

✓ Replacement Part Numbers

WG03F00975 replaces: WG03F01435, WR09X10049, WR9M439, WR9X278, WR9X339, WR9X342, WR9X350, WR9X364, WR9X366, WR9X375, WR9X409, WR9X418, WR9X428, WR9X438, WR9X464, WR9X465, WR9X466, WR9X468, WR9X470, WR9X484, WR9X487, WR9X502, WR9X503, WR9X5127, WR9X5161, WR9X5162, WR9X5163, WR9X5164, WR9X5192, WR9X5202, WR9X5204, WR9X526, WR9X528, WR9X576, WR9X587, WR9X594

XPart cross-reference: WG03F00975XP (aftermarket cross-reference)

✓ Installation Tips

• Unplug the refrigerator before beginning any repair
• The defrost timer is typically located in the control panel, behind the refrigerator, or inside the freezer compartment depending on model
• Note the wiring positions before disconnecting the old timer — take a photo for reference
• Turn the timer dial manually to advance it into the defrost cycle to test before reassembly
• Consult your model's service manual for exact timer location and wiring diagram