P1
Black+Decker Internal Condensate Tank Full Protection

Display shows P1 and the unit stops cooling; often accompanied by a water full indicator.

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Possible Causes

Full internal water tank, Blocked internal drain passage, Misaligned or stuck float, Faulty water level sensor or switch

How to Fix / Troubleshooting

Safety: Turn off and unplug the unit before draining water.

  • Drain water: Place a shallow pan under the lower rear drain outlet. Remove the drain cap and allow all water to drain. Reinstall the cap securely.
  • Continuous drain setup: If using a continuous drain hose, ensure it slopes downward with no kinks and that the end is not submerged in standing water.
  • Clean drain path: Remove the rear panel to access the condensate tray. Clean out any slime, mold, or debris blocking the drain outlet.
  • Check float mechanism: Verify that the float moves freely and is not stuck in the up position. Clean and reposition if necessary.
  • Test level switch: If P1 persists after draining and cleaning, test the water level switch or sensor with a multimeter and replace if faulty.
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Repair Difficulty

Easy 2/5

Required Part

Water Level Float Switch
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