Grill temperature swings widely when the lid is opened and closed, and recovery is very slow.

Safety first: Use heat-resistant gloves when working around a hot grill.

• Minimize lid opening: Plan cooks to reduce how often and how long the lid is open.
• Check for leaks: Inspect the lid-to-body interface for gaps. Install or replace a high-temperature gasket kit if compatible with your Weber model.
• Shield from wind: Position the grill out of direct wind, which can cool the cookbox and affect the RTD reading.
• Verify RTD location: Ensure the temperature probe is not directly in the path of cold air entering from leaks or vents.