Only a qualified professional should perform any repair service(s).
When replacing any electrical components they should be OEM factory components.
Be sure that any electrical components are properly wired and secured.
FLOW CHART FOR TROUBLESHOOTING OF THE UNIT
POWER
BREAKER/FUSE
TRIPPED
SUPPLY CORD NOT
PLUGGED IN OR IS
LOOSE IN POWER
RECEPTACLE
UNIT'S POWER CORD
TRIPPED
3 MINUTE TIME DELAY 
IS ACTIVATED
PLUG IN SECURELY THE SUPPLY CORD
RESET SUPPLY CORD'S LCDI
WAIT FOR THREE MINUTES
REPLACE SUPPLY CORD IF RESETTING DOES NOT CORRECT
TEMPERATURE SETTING IS NOT BELOW ROOM TEMPERATURE
SET TEMPERATURE SETTING ABOVE (HEATING MODE) OR 
BELOW (COOLING MODE)
ROOM TEMPERATURE
ELECTRICAL COMPONENT COMPR20ISED
TROUBLESHOOT ELECTRICAL 
COMPONENTS AND REPAIR OR REPLACE
TROUBLESHOOTING THE SEALED SYSTEM COMPONENTS
REPAIR OR REPLACED ALL COMPROMISED SEALED SYSTEM COMPONENTS
WEIGH IN UNIT'S SPECIFIC REFRIGERANT CHARGE