- Fan blade or fan motor not working properly
- Ice build-up on the fan inside the freezer
- Obstruction due to over-filling the unit
- Normal operation
- Humming, vibrating, crackling, knocking, or sizzling noise from freezer, refrigerator, or Wine Storage
- Is humming, vibration, or grinding a normal operating sound?
- Is it safe to operate the unit if humming?
- Buzzing noise stops when drawer or door is opened or knocking noise stops after a door or drawer is closed
- How to determine which fan motor is causing noise
- Glowing red inside freezer section
Steps to Verify Issue:
These steps assume a standard refrigerator and freezer combination unit.
- Adjust accordingly for all refrigerator, all freezer, or Wine Storage units.
- Note: Freezers go through normal defrost cycles, and moisture on or near a defrost heater can cause a sizzling or crackling noise.
First, determine if the noise is related to a fan motor:
- Open all doors on the product to determine if the noise stops. If noise continues with all doors open, close doors and skip ahead to next troubleshooting sequence below.
- Close only the refrigerator section door (or upper door on a Wine Storage unit) to see if the noise returns. If it does, the noise is related to the refrigerator evaporator fan motor. Contact Factory Certified Service.
- Open the refrigerator door again.
- Close only the freezer section door (or drawer in a Wine Storage unit) to see if the noise returns.
- If it returns, the noise is related to the freezer evaporator fan motor. Contact Factory Certified Service.
- The freezer fan is usually not visible, but ice may be.
- Close the doors after testing.
If the noise is not related to a fan motor:
- If the product has not been cleaned in the last 6 to 12 months, Clean the Condenser.
- If ice build-up is visible, defrost the section or area. In some models, it is possible to disable the freezer section to allow a manual defrost.
- Make sure food packaging is not pushed up into refrigerator or freezer fan.
- If any burning odor or other unusual symptoms accompany this noise, contact Factory Certified Service.
- If the refrigerator or freezer still makes abnormal noises after the troubleshooting steps are complete, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.
- Condenser Fan Motor Operation
- 600 Series Disable Single Section Starting with Serial # 1810000
- 700 Series Manual Zone Disable Mode
- Classic (Formerly Built-In) Manual Compartment Disable
- Designer (Formerly Integrated) Manual Compartment Disable Mode
- Manually Defrost a Sub-Zero
- Red Glow in Freezer
- Sub-Zero Gurgling or Hissing
- Sub-Zero Beeping
- Noise from Compressor Area
Refer to the product Use and Care Guide for further information.
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