Grill overshoots set temperature by 50°F or more and cycles between very high and low temperatures.

Safety first: Allow the grill to cool before touching the temperature probe.

• Clean RTD probe: Gently scrub the probe with a non-abrasive pad to remove carbon buildup that can insulate it.
• Check probe mounting: Ensure the probe is firmly attached to the cookbox wall and not bent or touching grates.
• Inspect auger feed: Watch the auger during operation (from the hopper) to ensure it cycles on and off smoothly. If it runs too long or intermittently sticks, clean the auger and tube.
• Firmware update: Use the Weber app (if supported) to check for controller firmware updates that may improve temperature control.
• Replace RTD if needed: If temperature readings are obviously inaccurate compared to a known-good grill thermometer, replace the RTD probe.