2 Common Radiator Thermostat Problems 2 Common Radiator Thermostat Problems
The radiator, thermostat, water pump, along with all its hoses, clamps and fluids make up your automobiles cooling system. One faulty part in the system and there can be serious damage to your engine.The thermostat reads the engine temperature and regulates the coolant flow to keep the engine at optimum running temperature. The most common reasons for the defective part is that it will be either stuck open or stuck closed.
Thermostat Stuck Open
When the thermostat gets stuck open or fails to close fully, a delay occurs in the vehicle warming up. This becomes a big problem in the colder months, traveling on a freeway because the temperature of the engine will drop below normal range causing improper use of the heater. Also your car's check engine light may activate and service codes may flash.
Thermostat Stuck Closed
Overheating occurs when the thermostat is stuck in the closed position. The reason being is that since it is stuck the coolant can’t flow through to cool the engine even though the mercury sensor in the thermostat is hot enough to allow this function. This will cause your engine to overheat, and is a much more serious problem than the thermostat being stuck in the open position.
Radiator thermostat problems are common, and most times the part must be replaced. This is one of the more inexpensive repairs to make if caught in a timely fashion. Waiting too long, or ignoring warning signs of this problem could make this repair cost grow if enough damage is done to your sensitive engine parts.