Dehumidifier is Icing when Running

A dehumidifier can ice up due to a few primary reasons: Low Room temperature, Air Flow is restricted, the coils and filters are dirty, or the humidity sensor may be faulty.

• Low Room Temperature:

  Dehumidifiers are designed to work optimally within a specific temperature range, typically above 60°F (15°C). If the room is too cold, the cooling coils may freeze up.

   

  Restricted Airflow:

  Insufficient airflow through the dehumidifier can cause the coils to freeze. This can be caused by blockages like dirty filters, dust buildup on the coils, or even the unit being positioned against a wall.

  • Dirty Coils and Filters:

    Dirty coils and filters can restrict airflow and reduce the dehumidifier's efficiency, leading to ice formation.

    • Thawing Function Failure:

      Some dehumidifiers have an automatic defrost cycle which is designed to prevent ice buildup. If this cycle fails, ice can accumulate on the coils. 

      • Humidity Sensor Issues:

        A malfunctioning humidity sensor can cause the dehumidifier to run continuously, even when the desired humidity level is reached, leading to coil icing.