Unit pumps water automatically but not when PURGE
button is pushed.
1. Bad connection in PURGE button circuit
2. Defective control board
Evaporator coil frosted continuously, low dehumidifying
capacity.
1. Defrost thermistor loose or defective
2. Low refrigerant charge
3. Dirty air filter or restricted air flow
4. Upper housing is not sealed to lower housing
Compressor runs with POWER button OFF.
1. Defective relay
2. Defective control board
3. Upper housing not sealed to tower
5.3 Air Mover
The motorized impeller has a PSC motor and internal
thermal overload protection. If defective, the complete
assembly must be replaced.
1. Unplug power cord
2. Remove the four screws attaching the bottom plate to
the lower housing
3. Disconnect the impeller leads
4. Remove the four screws holding the impeller to the
bottom plate
5. Reassemble the new impeller using the above
procedure in reverse
5.4 Thermistor
The defrost thermistor
is attached to the
refrigerant suction
line between the
accumulator and the
evaporator.
To replace thermistor:
1. Unplug the
dehumidifier
2. Remove the front
housing
3. Cut cable ties and
remove insulation and aluminum tape.
4. Remove control panel
5. Unthread thermistor from control housing grommet
Figure 8: Picture of the
float safety switch.
6. Detach thermistor from control board jumper
7. Reassemble thermistor and dehumidifier using the
above procedure in reverse
5.5 Condensate Pump
The internal condensate pump removes water that collects
in the reservoir.
To replace the condensate pump:
1. Unplug the unit
2. Remove the front housing
3. Unplug the pump wires from the wire harness
4. Remove the condensate hose and the one screw
attaching the pump bracket to the compressor support
5. Replace the pump, hose, wiring, bolts, and housing in
the reverse order
5.6 Float Safety Switch
The float safety switch activates when the water rises too
high in the condensate reservoir. The float safety switch
turns off the compressor until the water level lowers and
disengages the switch.
To replace the float safety switch
1. Unplug the dehumidifier
2. Remove the front housing
3. Unplug the float safety switch
wires from the wire harness
4. Remove the one screw
attaching the pump and
float switch bracket to the
compressor support
5. Remove the pump from the reservoir and slide out the
float switch from under the compressor support
6. Replace the float, pump, wiring, bolts and housing in
the reverse order
6
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Figure 7: Picture of pump and float switch brackets screw.
Figure 6: Thermistor attached to the
refrigerant line.
