![]() When the coolant level is low, the engine will not be cooled down properly. If you notice that the level is low, it usually means that some of the coolant has leaked out or evaporated over time. The coolant level in your car should be monitored on a regular basis to ensure it is constantly topped up. Coolant helps to disperse heat more effectively and prevent overheating, which can be damaging to the engine. Low coolant levelĬoolant is an important element in a car’s engine, helping to keep it running smoothly and efficiently. Then, swap out your current sensor for a new model and restore your car’s cooling systems back to normal. In this case, they’ll be able to flush out any old coolant still lingering in the system. This malfunction often occurs through long-term wear and tear on the sensor, which is responsible for monitoring the coolant temps in your engine block.įortunately, replacing a faulty coolant temperature sensor is relatively straightforward when you get it checked out by a mechanic. If the sensor isn’t functioning properly, it won’t detect when the engine needs to be cooled and can cause the fan to run continuously.įaulty coolant temperature sensors are one of the most common reasons a car fan won’t turn off. It sends a signal to the fan’s electrical circuit when the engine gets too hot. The coolant temperature sensor is responsible for controlling the car fan. This triggers a voltage signal to be sent out which allows it to monitor the coolant’s temperature accurately and triggers the radiator fan. When temperatures rise, heat from the engine is absorbed by the fluid in this pocket, causing it to expand and press against the sensing element. The coolant temperature sensor contains an interior heating element and a platinum or nickel-based sensing probe, which sits within a fluid-filled pocket inside the cylinder head. The sensor sits in the internal cooling system of the car, providing essential information about temperature and pressure readings. ![]() ![]() Bad coolant temperature sensorĪ coolant temperature sensor is an important component for regulating the engine’s temperature in modern cars. If your car fan won’t turn off, it could be due to these five most common reasons: 1. Key Takeaway 5 Reasons Why Your Car Fan Won’t Turn Offĥ Reasons Why Your Car Fan Won’t Turn Off ![]()
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