Viking Refrigerator Loud Humming or Buzzing Noise:... | appliancefaults.com

Technical Background:

The refrigerator's Main Control Unit (MCU) controls various components based on temperature sensors and user settings. The MCU sends voltage (120V AC) to the compressor, condenser fan motor, evaporator fan motor, and other components. A fault in any of these components or their control circuits can cause excessive noise.

Symptoms:

The homeowner reports a loud humming or buzzing noise coming from the Viking refrigerator. The noise may be constant or intermittent, and it may be louder at certain times of the day. The refrigerator may still be cooling, or the cooling performance may be reduced.

Possible Causes:

Loose components causing vibration.
Faulty condenser fan motor.
Failing evaporator fan motor.
Compressor issues.
Defective relay or start capacitor.
Icemaker water valve hum.

Solution:

1

Unplug the refrigerator or turn off the breaker at the breaker panel.
2

Inspect and tighten any loose screws or mounting hardware, especially around the compressor and fans. Use a 1/4-inch nut driver or a Phillips head screwdriver.
3

Access the condenser fan motor (usually located at the bottom rear) and check for obstructions. If clear, test the motor windings for continuity using a multimeter. A reading of OL (open line) indicates a bad motor.
4

Access the evaporator fan motor (inside the freezer compartment). Check for ice buildup or obstructions. If clear, test the motor windings for continuity. Again, OL means bad motor.
5

If the noise seems to be coming from the compressor, check the start relay and capacitor. Disconnect power and use a multimeter to test the capacitor's capacitance (should be within +/- 10% of its rating). Replace if faulty.
6

If the icemaker is filling with water, but not turning on or is making a loud hum when filling, check the icemaker water valve solenoid resistance. It should be around 200-500 ohms.
7

If all components test within range and are clean, then the compressor may be the issue and a refrigeration tech with EPA 608 certification must diagnose and repair it. Refrigerant circuits must be evacuated and recharged by certified technicians only.

Safety Warning:

Always disconnect power to the refrigerator before performing any repairs. Use proper Lock-Out/Tag-Out (LOTO) procedures to prevent accidental re-energizing of the circuit. High voltage (120V AC) is present in many components. Work with a qualified technician if unsure.

Prevention:

Regularly clean the condenser coils (located at the bottom or back of the refrigerator) every 6 months using a vacuum cleaner with a brush attachment. This improves airflow and reduces the load on the compressor, potentially preventing future noise issues.

Expert Tip:

Many Viking refrigerators have a diagnostic mode accessible through the control panel. Consult the service manual or search online for the specific key sequence for your model. This mode can display error codes and component test functions.

Frequently Asked Questions

•What is the typical lifespan of a Viking refrigerator compressor?

The typical lifespan of a Viking refrigerator compressor is around 10-15 years, but this can vary depending on usage, maintenance, and environmental conditions.

•What type of refrigerant does my Viking refrigerator use, and is it safe to handle?

Viking refrigerators typically use R-134a or R600a refrigerant. It is not safe for untrained individuals to handle refrigerant. Refrigerant work needs to be performed by a certified technician (EPA Section 608). Improper handling can lead to environmental damage and personal injury.

•How do I access the condenser coils on my Viking refrigerator to clean them?

The location of the condenser coils varies by model. On some models, they are located at the bottom rear behind a kickplate, which can be removed with a screwdriver or by hand. On other models, they are on the back of the unit. Unplug the refrigerator before cleaning. Use a vacuum cleaner with a brush attachment to remove dust and debris.

Viking Refrigerator Loud Humming or Buzzing Noise: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical lifespan of a Viking refrigerator compressor?

•What type of refrigerant does my Viking refrigerator use, and is it safe to handle?

•How do I access the condenser coils on my Viking refrigerator to clean them?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: