Coolant temperature too high, indicator light flashes while driving
There is too little coolant in the system
The expansion tank must be filled to the maximum mark. If necessary, add liquid. Check the tightness of the cooling system by contacting the workshop
Thermostat does not open. Coolant circulates only in the small circuit
Check if the hoses leading to the radiator are hot. If not, remove and check the thermostat. Replace it if necessary.
The radiator fins are dirty
Blow out the radiator from the engine side with compressed air.
The radiator is clogged with limescale or rust
Radiator hoses not heating up
Replace the radiator.
The radiator fan does not work
Replace the viscous fan belt.
Check the reliability of the fastening of the thermal switch and electric fan plugs.
Check the fan's thermal switch to make sure it is receiving power (ignition on, contacts of the thermal switch plug are shorted). If power is supplied, replace the electric fan.
Defective steam valve on expansion tank cap
Pressure test the cooling system. Replace the cap if necessary.
Coolant temperature gauge is faulty
Check the coolant temperature gauge sensor and the gauge itself.