Black+Decker Intermittent Power Loss / Overheat Shutdown

Coffee maker turns off mid-brew and does not complete the brewing cycle.

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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

Overheating causing thermostat to open prematurely, loose power cord connection inside unit, failing control board relay, scaled heating tube causing localized overheating

How to Fix / Troubleshooting

Safety first: Unplug and allow the unit to cool before inspection.

Simple checks:

  • Confirm the auto-shutoff timer is not set to an unusually short duration.
  • Ensure the coffee maker is on a stable, ventilated surface and not enclosed, which can trap heat.

Internal inspection:

  • Remove the bottom cover and inspect the power cord strain relief and internal connections for looseness or charring.
  • Check the warming plate thermostat for signs of overheating or poor contact with the plate.
  • Run a descale cycle to reduce scale in the heating tube, which can cause hot spots and premature thermostat opening.

Control board:

  • If the unit loses all power mid-brew and then comes back after cooling, the control relay or triac may be overheating.
  • Inspect the control PCB for cracked solder joints at the relay or power components; resolder or replace the board as needed.

When to replace:

  • Replace a weak or erratic warming plate thermostat if it opens too early.
  • Replace the main control PCB if relay failure is suspected.
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Repair Difficulty

Hard 4/5

Required Part

Warming Plate Thermostat
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