WhisperKool GSM-01 User Manual

Page 20

GSM-01 081310

1.  Faulty blower 

motor or broken wire 

connection

•  Evaporator coil probably frozen
•  Shut off power to condensing unit
•  Call a CERTIFIED HVAC service technician for repair

2.  Defective low 

pressure switch not 

shutting compressor off 

when pressure drops

•  Compressor would continue to run when thermostat is 

satisfied and shuts blower and solenoid off. When space 

warms up to set point, blower starts and the system 

runs normally.

•  Prolonged running without refrigerant flow will 

damage or destroy compressor. If this condition exists, 

call a CERTIFIED HVAC service technician.

1.  System pressure 

controls defective.

Call a CERTIFIED HVAC service technician to verify and 

repair.

2.  System low on 

refrigerant.

Observe for flashing in refrigerant sight glass located in 1/4” 

copper tube at condensing unit. If flashing with bubbles, 

call a CERTIFIED HVAC service technician for leak location, 

repair, and adding refrigerant.

3.  Condenser fan motor 

defective

•  Fan does not run with compressor.  
•  ¼” Copper tube at sight glass – very hot, compressor 

very hot, runs short time, shuts off.

•  Shut power off to condensing unit
•  Call a CERTIFIED HVAC service technician for repair.

4.  Compressor starting 

components defective.

•  Compressor very hot and hums when trying to start.

•  Shut power off to condensing unit.

•  Call a CERTIFIED HVAC service technician.

1.  Air filter, if equipped, 

dirty

Clean or replace filter

2.  Evaporator coil and/

or blower dirty

Clean coil and blower

3.  Thermostat set point 

too low.

Set point should not be lower than 50°. If so, increase to 

above 50°

4.  System low on 

refrigerant

Check refrigerant “sight glass” in 1/4” tubing. Check for bubbles 

after system has run for several minutes. If bubbles present, 

call a CERTIFIED HVAC service technican. If sight is clear of 

bubbles, refrigerant level is OK.