Why is the car temperature rising slowly?
1 Answers
The slow rise in car coolant temperature is generally caused by a faulty thermostat that fails to close, or a malfunctioning cooling fan that remains constantly running. When the thermostat valve fails to close, the coolant continuously circulates in the large loop, causing the car's coolant temperature to drop rapidly. If the cooling fan is malfunctioning and keeps running, it can also result in low coolant temperature. Additional information: 1. The method to address low car coolant temperature is to first check if there are issues with the cooling system, such as: whether the shutters are blocked, whether the fan blades are deformed, or whether the coolant temperature sensor and circuit are short-circuited. The thermostat can be disassembled and inspected by placing it in water at different temperatures to observe its opening behavior. If it fails to open and close properly, the thermostat should be replaced. 2. The thermostat is a component that automatically acts as a valve based on the engine's coolant temperature. It is typically installed at the outlet of the radiator and the inlet of the water pump, controlling the circulation of the coolant in the cooling system, determining whether it follows the large loop or the small loop. The large loop refers to the coolant flow path when the thermostat is open. The small loop refers to the coolant flow path when the thermostat is closed. If the coolant temperature is low, it may be because the thermostat is constantly open, causing the coolant to continuously circulate in the large loop and resulting in a drop in temperature.
