What are some of the most common issues that cause vehicles to overheat?

20 September 2025

An overheating car is not just inconvenient—it’s also potentially damaging to the engine if the issue is not addressed quickly. The cooling system plays a critical role in regulating engine heat, and when something goes wrong, temperatures can rise fast. Understanding the common causes of overheating can help you recognize problems early and take action before more extensive repairs are needed. At Automotive Repair Specialist, we provide expert cooling system repair in the greater Nampa, ID area. Here are four common causes of overheating.


Radiator Problems

The radiator is responsible for releasing the heat absorbed by coolant into the air. If it becomes damaged or blocked by debris, it can’t effectively dissipate heat. Also, a failing radiator fan may prevent proper airflow. These issues reduce the cooling system’s efficiency and can cause overheating under normal driving conditions.


Failing Water Pump 

The water pump is responsible for keeping coolant moving through the engine and radiator. A failing water pump can’t circulate coolant effectively, leading to overheating. Signs of water pump trouble often include leaks, unusual noises, or coolant pooling beneath the vehicle. If ignored, a failed water pump can quickly lead to engine damage.


Low Coolant Levels

Coolant is the fluid that absorbs heat from the engine and transfers it through the radiator. If the coolant level is too low, there isn’t enough fluid to properly regulate temperature. This often happens because of leaks in hoses, the radiator, or the water pump. Without sufficient coolant, the engine can quickly overheat and sustain serious damage.


Malfunctioning Thermostat

The thermostat controls the flow of coolant through the engine and radiator, opening and closing as needed to regulate heat. When the thermostat becomes stuck closed, coolant circulation stops, causing temperatures to rise rapidly. This is a common cause of overheating, and while replacing the thermostat is generally a straightforward repair, delaying it can lead to severe engine problems.


Cooling System Repair in Nampa, ID

For auto repair in Nampa and the surrounding area, contact Automotive Repair Specialist at 208-461-1330. Feel free to give us a call to make an appointment!