Control panel shows Er4 and grill shuts down; fan may continue briefly; often occurs during a cook.

Safety first: If you suspect a grease fire, keep the lid closed, turn the grill off, and unplug it. Do not open the lid until flames subside. Never use water on a grease fire.

Steps after cool-down:

• Inspect for grease buildup: Once completely cool, remove grates and drip tray. Check for heavy grease accumulation on the drip tray, in the grease channel, and in the bottom of the barrel.
• Clean the cook chamber: Scrape and remove grease and food debris. Empty and clean the grease bucket. Ensure the grease drain channel is open.
• Check exhaust flow: Inspect the chimney and any exhaust ports for obstructions (soot, nests, foil caps). Clean as needed to restore proper airflow.
• Clean the RTD probe: Wipe the temperature probe with a non-abrasive pad to remove baked-on grease that can cause false high readings.
• Verify set temperature: Avoid running the grill at maximum temperature with the lid closed for extended periods, especially with fatty foods that drip heavily.
• Reset and test: Plug the grill back in, clear the error by cycling power, and run at a moderate temperature while monitoring for abnormal temperature spikes.