P1
Pro Breeze Defrost Mode Active / Low Temperature Protection

Dehumidifier shows P1 and does not start dehumidifying.

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Possible Causes

Evaporator coil temperature below operating threshold, Room temperature too low for normal operation, Frost buildup on evaporator coil, Faulty evaporator temperature sensor reading low

How to Fix / Troubleshooting

Note: On many Pro Breeze dehumidifiers, P1 is an informational code indicating the unit is in defrost mode, not a failure.

Steps to handle P1:

  • Check room temperature: Ensure the room is within the specified operating range (typically above 5°C / 41°F). If the room is too cold, move the unit to a warmer area.
  • Allow defrost cycle: If the unit has been running in a cool, damp space, P1 may appear while the coil defrosts. Leave the unit plugged in and allow 10–20 minutes for the cycle to complete.
  • Inspect for ice: If safe to do so, unplug the unit and remove the front panel to check the evaporator coil. If heavily iced, allow it to fully thaw before restarting.
  • Improve airflow: Clean the air filter and ensure adequate clearance around the unit to reduce icing.
  • Sensor check: If P1 never clears even in a warm room, the evaporator temperature sensor may be misreading. Inspect and test the sensor as described under E2, and replace if defective.
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Repair Difficulty

Easy 2/5

Required Part

Evaporator Temperature Sensor (NTC)
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