1.CHECK COOLING SYSTEM
 
 2.CHECK OPERATION
 
 3.CHECK SETTING OF TEMPERATURE SETTING TRIMMER
 
 4.CHECK SELF-DIAGNOSIS RESULT CHECK
 
 5.CHECK EACH OUTPUT DEVICE
 
 6.CHECK AIR LEAKAGE FROM DUCT
 
 7.CHECK HEATER HOSE INSTALLATION CONDITION
 
 8.CHECK TEMPERATURE OF HEATER HOSE
 
 9.REPLACE HEATER CORE