Cooled Excessively

Trouble Symptom	Suspected Cause	Correction
Low heater performance (cool air blowed-out) Thermogauge indicates 'LOW'	Visually check after removing the radiator cap. Insufficient coolant or leakage.	After refilling coolant, recheck.
	Check KDS & engine start Check DTCs Check connection of the fan clutch or the fan motor. * If the fan clutch is always connected, there will be a noise at idle.	Check the engine coolant sensor, wiring and connectors. Replace the components.
	Remove the thermostat and inspect. Check if there are dust or chips in the thermostat valve. Check adherence of the thermostat.	Clean the thermostat valve and reuse the thermostat. Replace the thermostat, if it doesn't work properly.