Heater cabinet panels rattle or buzz during operation

Safety first: Turn off power before tightening panels.

• Tighten screws: Check all accessible panel screws and fasteners and tighten them.
• Add padding: Where two panels vibrate against each other, add thin foam tape or rubber strips to dampen noise.
• Check base: Ensure the unit is firmly anchored to its base and not rocking.

Persistent structural noise may require panel adjustment or replacement but is usually a minor issue.