TABLE 2
– TROUBLESHOOTING GUIDE
Symptom
Possible Reason
Troubleshooting Procedure
Dehumidifier does not
turn on/run�
No power to unit�
• Check that the dehumidifier is plugged in�
• Check that the power switch is turned ON�
• Check that the control is turned ON�
• Check that the circuit breaker has not tripped�
Dehumidifier blower is
running but with little or
no airflow�
Pressure drop across
dehumidifier is too high�
• Check dehumidifier air filter and replace if necessary�
• Check for blocked duct work and clear�
Dehumidifier blower is
running but compressor
is not�
Float switch open�
• If float switch installed, check connections at control board and empty condensate pan�
• If no float switch installed check that the jumper is installed at the float switch terminals on the control
board�
Coil frosting – defrost�
• Lack of or reduced airflow� Check dehumidifier air filter and replace if necessary�
• Check for blocked duct work�
• Inlet air conditions below 60°F� Increase the humidity setting�
Inlet air temperature is
outside of the 50°F –
104°F range or the dew
point is below 40°F and
there is a demand for
dehumidification�
• Verify all ductwork is properly sealed�
Dehumidifier is not
draining properly�
Drain line blocked or unit
not level�
• Verify that the unit is level�
• Check the drain line blockages and for a continuous downward slope�
• Verify presence and condition of drain insert� See
MAINTENANCE
for cleaning procedure, or replace
with part number 5885 if missing or damaged�
Dehumidifier is
producing hot air�
Normal function�
• Air is reheated across the condenser coil, resulting in a temperature rise between inlet and outlet, this is
normal�
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