Furnace vibrates excessively or rattles during operation.

Safety: Turn off power before tightening any screws or touching moving parts.

• Tighten panels: Check and tighten all front and side panel screws on the Kospel furnace.
• Inspect fan mounting: Ensure the combustion fan is firmly secured to its bracket and that rubber mounts are intact.
• Support pipework: Add or adjust pipe clamps to prevent pipes from resonating against walls or the furnace casing.

If vibration persists and seems to come from the fan or pump internals, a technician should inspect for worn bearings or imbalance.