Bunn Warmer Element Failure

Bunn coffee maker warmer plate does not heat; coffee gets cold quickly.

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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.

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Possible Causes

Open warmer heating element, Failed warmer switch, Loose wiring to warmer, Faulty warmer thermostat (if equipped)

How to Fix / Troubleshooting

Safety: Unplug the brewer and allow the warmer to cool before testing.

Steps:

  • 1. Check warmer switch: Verify the warmer switch light (if present) turns on. Test continuity across the switch when on; replace if it does not close.
  • 2. Test warmer element: Access the underside of the warmer plate. Disconnect one lead and measure resistance across the element. An open reading indicates a failed element that must be replaced.
  • 3. Inspect wiring: Ensure all connectors to the warmer are tight and not burnt. Repair or replace damaged wires.
  • 4. Thermostat (if present): Some models use a thermostat to control warmer temperature. Test for continuity when cold; replace if open.
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Repair Difficulty

Medium 3/5

Required Part

Warmer Heating Element
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