The furnace causes noticeable vibration or rattling in the ducts and cabinet.

Safety: Turn off the power before tightening or adjusting components.

• 1. Tighten panels: Check and tighten all access panel screws on the furnace.
• 2. Inspect blower: Ensure the blower assembly is securely mounted and not contacting the cabinet.
• 3. Level furnace: Verify the furnace is level and stable on its platform. Shim it if necessary.
• 4. Duct supports: Add or adjust duct hangers to reduce movement and rattling.