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WHISPERKOOL TROUBLESHOOTING GUIDE
Unit has ice forming on the evaporator unit
Possible cause Solution
If coil is very dirty, use a spray bottle with a small amount of liquid
There is something blocking the supply and/or return air Remove blockage
The evaporator fan is not turning on Call customer service for details on how to perform the bypass plug
test. If all components run correctly, and the system cools during the
bypass plug test, there is either an issue with the 24V
thermostat conversion kit or the thermostat. Contact customer
service for further action.
If evaporator unit continues to ice Observe ice formation pattern. If only part way up the coil face, the
system could be low on refrigerant. If all the way up, the coil may be
The set point is too low Raise set point to recommended temperature of 55°F
Unit does not run/power up
Possible cause Solution
Evaporator unit is not plugged in Make sure the unit is plugged into an outlet
Power switch not on Turn unit on by pressing the power button on the control
Line voltage rating is incorrect for the system Check line voltage to make sure there is 110V-120V
Thermostat not calling for cooling Adjust thermostat to a lower temperature
Faulty thermostat or wiring Call Customer Service at 1-800-343-9463
Cellar temperature is too warm
Possible cause Solution
The temperature of the room to which the condensing unit exhausts
exceeds 110°F Intake temperature needs to drop below 110°F
The system is undersized for the cellar Order correct size system
There is something blocking the supply and/or return air on the
evaporator unit or the condensing unit
Evaporator unit is mounted too low in the cellar Relocate unit so the distance from the ceiling and top of the unit is
no more than 18”
One or more of the fans is not turning on Please contact the installing technician to troubleshoot
Compressor is not turning on Please contact the installing technician to troubleshoot
Compressor keeps cycling on overload
Poor seal around door or other areas requiring a seal (around the
unit, wall joints, etc.)
Make sure there are no air gaps around the door. If door seal is
damaged, replace it.
Thermostat set too high Adjust thermostat to a lower temperature
Evaporator coil is frosted or iced up Observe ice formation pattern. If only part way up the coil face,
evaporator unit could be low on refrigerant. If so,
contact your installing technician to assist with troubleshooting.
System runs constantly
Possible cause Solution
Leaky door seal or poorly insulated cellar Fix leaky door seal and insulate cellar
