Bunn coffee maker will not power on at all; no lights or display.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety: Unplug the coffee maker before any disassembly. If you smell burning or see melted plastic, do not attempt to power it again until inspected.
Steps:
- 1. Check outlet and breaker: Test the outlet with another appliance. Reset any tripped GFCI or breaker.
- 2. Inspect power cord: Look for cuts, frays, or loose plug blades. Replace the cord if damaged.
- 3. Test power switch: Remove the housing to access the on/off rocker or toggle switch. With the unit unplugged, test continuity across the switch terminals when turned on. Replace if it does not close properly.
- 4. Check internal fuse: Many Bunn models include an inline or board-mounted fuse. Test with a meter and replace only with the same rating if blown. Investigate why it blew (shorted heater, wiring, etc.).
- 5. Thermal fuse on heater: Some home Bunn brewers use a thermal fuse attached to the heater. If open, the unit may appear dead. Replace with the correct temperature and current rating; do not bypass.
When to call a pro: If fuses blow repeatedly or you find burnt wiring, have a qualified technician inspect for shorts or component failures.