P3
Sencor Low Refrigerant / Refrigeration System Protection

Dehumidifier displays P3 and will not start compressor

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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

Refrigerant leak in evaporator or condenser, Blocked capillary tube, Severely restricted airflow causing abnormal pressures, Faulty pressure switch (if equipped)

How to Fix / Troubleshooting

Safety: Unplug the unit. Refrigerant system repairs must be performed by certified technicians.

Steps (user-level):

  • Check airflow: Clean the air filter and ensure inlet/outlet are unobstructed.
  • Visual inspection: Look for oil stains on refrigerant tubing, which can indicate a leak.
  • Temperature check: After brief operation (if allowed), carefully feel the evaporator and condenser coils. If both remain at similar temperature and no condensation forms, refrigerant may be low.

Professional service: P3 typically indicates a sealed system problem. Contact an authorized Sencor service center for leak detection, evacuation, and recharging or component replacement.

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Repair Difficulty

Professional Required 5/5

Required Part

Sealed Refrigeration System
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