Dehumidifier Common Parts Glossary

Air filter

The air filter is behind the grill in the dehumidifier case. The air filter traps dust and debris in the air that would contaminate the evaporator fins and condenser coils.

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Dehum Air filter 42_580_5230A20040B
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Collection bucket

The collection bucket is a container that’s positioned under the evaporator to collect the condensate water from the evaporator.

Compressor

The compressor is a pump that compresses the refrigerant gas that runs through the evaporator to initiate the cooling process and water extraction. The compressed refrigerant gas first goes through the condenser where the refrigerant cools and condenses into a liquid. The liquid refrigerant then moves into the low-pressure evaporator where the refrigerant evaporates and absorbs the heat from the air moving over the evaporator fins, causing the cooling process.

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Dehum Compressor 42_580_2520UCBA010
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Condenser

The condenser is a heat exchanger that cools the hot, high-pressure refrigerant gas, converting it to a liquid. The liquid refrigerant then flows through the low-pressure evaporator, where the liquid refrigerant evaporates to a gas. During evaporation process, the refrigerant absorbs heat from the air that the evaporator fan blows across the evaporator fins. Cooling the refrigerant in the condenser increases the efficiency of the heat exchange process in the evaporator.

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WAC Condenser 042_253_5303306719
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Electronic control board

The dehumidifier electronic control board controls the major electro-mechanical components in the dehumidifier. The electronic control board monitors input from the humidistat and activates the compressor to dehumidify the space when humidity exceeds the level the user sets. Input from the thermistor (temperature sensor) on the evaporator is also used to detect frost on the evaporator. The electronic control board shuts off the compressor when excessive frost builds up on the evaporator. With the compressor shut off, the frost melts and the condensate water drips into the collection bucket. Once the fins are clear of frost, the electronic control board restarts the compressor if the space needs dehumidification.

Evaporator

The evaporator is a heat exchanger that cools air and condenses water on its fins to dehumidify the room. The collected condensate water drips from the fins into the water collection bucket.

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Dehum Evaporator 42_580_ADL36964807
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Fan

The evaporator fan blows air across the evaporator and condenser heat exchangers to aid cooling and dehumidification.

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Dehum Fan 42_580_5900A20007B
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Humidistat

The dehumidifier humidistat is a sensor that detects the water vapor or percent of humidity in the room. The humidistat provides input to the dehumidifier’s electronic control board through a wire harness connection.

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Dehum Sensor Assembly 42_580_6877A30013R
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Thermistor

The thermistor is a temperature sensor that’s connected to the dehumidifier’s electronic control board through a wire harness.

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Dehum Sensor Assembly 42_580_6877A30013R
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User interface control board

The user interface control board houses the selection buttons and display indicators. The user interface control board is connected to the dehumidifier’s electronic control board through a wire harness. Selection and display data are communicated between the user interface control board and the electronic control board to properly control the dehumidifier functions.