Grill temperature swings widely (±40–60°F) around the setpoint during a cook.

Safety first: Unplug the grill before accessing the controller or RTD wiring.

• Secure RTD connection: Reseat the RTD connector on the control board and ensure the cable is not moving when the lid opens/closes.
• Stabilize environment: Shield the grill from strong wind and avoid frequent lid opening.
• Stir pellets: Occasionally stir pellets in the hopper during long cooks to prevent bridging and inconsistent feed.
• Replace RTD if intermittent: If tapping or moving the RTD cable causes the temperature reading to jump, replace the RTD probe.
• Update firmware: Check with GMG for any controller firmware updates that improve temperature control.