Bunn coffee maker emits a burning smell during operation.

Safety: Turn off and unplug the brewer immediately if you smell burning. Do not continue to operate until the source is found.

Steps:

• 1. Inspect warmer plate: Once cool, clean any burnt coffee, filters, or spills from the warmer plate. Use a non-abrasive cleaner.
• 2. Check for visible damage: Remove covers and look for melted insulation, darkened wires, or burnt spots on the control board or around the heater.
• 3. Test warmer element: If the smell is localized to the warmer, test its resistance and inspect for hot spots or warping. Replace the warmer plate assembly if suspect.
• 4. Inspect wiring harness: Ensure wires are not touching the heater or hot surfaces. Replace any brittle or charred wiring and secure with high-temp ties.
• 5. Do not bypass safety devices: If a thermal fuse or high-limit has opened due to overheating, identify and correct the cause before replacing the device.