What are the reasons for high temperature in old Jetta cars?
1 Answers
Radiator fan not rotating, poor radiator cooling, and thermostat malfunction can all cause high temperature in old Jetta cars. Radiator fan not rotating: The simplest way to check if the radiator fan is functioning properly is to turn on the vehicle's air conditioning cooling system. If the air conditioning compressor has started but the fan still does not rotate, the fan must be faulty. Poor radiator cooling: This situation often occurs during the months of April and May when there is an abundance of willow catkins and cotton fluff. To check, simply open the engine hood and observe whether the radiator located behind the bumper is clogged with excessive debris. If the radiator is severely blocked, it needs to be cleaned at a repair shop. Thermostat failing to open properly: In this case, the coolant cannot circulate normally and fails to provide cooling. The main symptoms are that both the radiator and the return hose remain at room temperature (they should normally be hot), and due to gas expansion inside the hoses, both the upper and lower hoses become very hard.