Safety: Let the grill cool before adjusting internal components.

Level the grill: Use a level to ensure the grill is not tilted. Adjust casters or feet as needed.
Clean and inspect diffuser: Remove and clean the diffuser plate. Check for warping; replace if significantly distorted.
Check convection fan: Ensure the fan is running and that its intake and output are not blocked by foil or debris.
Load management: Avoid overcrowding one side of the grill. Distribute food evenly and rotate items during long cooks.

Uneven cooking, hot spots on one side of grill

Possible Causes