Loud humming, buzzing, or rattling noise during operation.

Safety: Unplug the cooler before adjusting components or touching moving parts.

• Level the unit: Adjust the Blastcool leveling feet so the cabinet is stable and does not rock.
• Check compressor mounts: Access the rear and ensure the compressor mounting bolts and rubber grommets are intact and snug (not overtightened).
• Secure tubing: Gently bend copper lines away from cabinet walls or each other if they are touching and vibrating. Do not kink the tubing.
• Inspect fans: Ensure fan blades are not hitting shrouds or wiring. Tighten any loose fan mounting screws.

Persistent loud mechanical noise from inside the compressor indicates internal wear; compressor replacement by a technician may be required.