Hyundai Santa Fe: Thermostat. Troubleshooting - Cooling System - Engine Mechanical System - Hyundai Santa Fe DM 2013-2019 Service ManualHyundai Santa Fe: Thermostat. Troubleshooting

Troubleshooting

Symptoms
Possible Causes
Remedy
Coolant leakage
Х
From the thermostat gasket
Check the mounting bolts
Х
Check the torque of the mounting bolts
Х
Retighten the bolts and check leakage again.
Check the gasket for damage
Х
Check gasket or seal for damage
Х
Replace gaskets and reuse the thermostat.
Cooled excessively
Х
Low heater performance (cool air blows-out)
Х
Thermogauge indicates 'LOW'
Visually check after removing the radiator cap.
Х
Insufficient coolant or leakage.
Х
After refilling coolant, recheck.
GDS check&Starting engine
Х
Check DTCs
Х
Check connection of the fan clutch or the fan motor.
※ If the fan clutch is always connected, there will be a noise at idle.
Х
Check the engine coolant sensor, wiring and connectors.
Х
Replace the componants.
Remove the thermostat and inspect
Х
Check if there are dusts or chips in the thermostat valve.
Х
Check adherence of the thermostat.
Х
Clean the thermostat valve and reuse the thermostat.
Х
Replace the thermostat, if it doesn't work properly.
Heated excessively
Х
Engine overheated
Х
Thermogauge indicates 'HI'
Visually check after removing the radiator cap.
Х
Insufficient coolant or leakage.
※ Be careful when removing a radiator cap of the overheated vehicle.
Х
Check air in cooling system.
Х
After refilling coolant, recheck.
Х
Check the cylinder head gaskets for damage and the tightening torque of the mounting bolts.
GDS check&Starting engine
Х
Check DTCs
Х
Check the fan motor performance as temperature varies.
Х
Check if the fan clutch slips.
Х
Check the water pump adherence or impeller damaged.
Х
Check the engine coolant sensor, wiring and connectors.
Х
Check the fan motor, the relay and the connector.
Х
Replace the fan clutch, if it doesn't work properly.
Х
Replace the water pump, if it doesn't work properly.
Immerse the thermostat in boiling water and inspection.
Х
After removing the thermostat, check it works properly.
※ Check the thermostat opens at the valve opening temperature.
Х
Replace the thermostat, if it doesn't work properly.


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