Refrigerator making loud buzzing or humming noise from rear.

Safety first: Unplug the refrigerator before cleaning or adjusting components.

Steps to check:

• Clean condenser coils: Remove the rear lower panel and vacuum dust from the condenser coils using a soft brush attachment.
• Inspect fan: Check the condenser fan for debris or bent blades. Clear obstructions and ensure the fan spins freely.
• Check compressor mounts: Verify that the compressor mounting bolts or rubber grommets are intact and not allowing metal-to-metal contact.
• Secure tubing: Look for refrigerant lines touching each other or the cabinet. Gently bend or pad them to eliminate vibration contact.