Low Water Sensor Replacement

Your engine needs coolant in order to maintain an optimum operating temperature. In order to ensure that optimal temperature is maintained, you need the right amount of coolant in the radiator, reservoir, and engine. If the temperature exceeds a threshold, serious damage can occur. Leaks will result in low levels of coolant, which will be detected normally by low water sensors (or, more accurately, coolant level sensors). The low water sensor doesn’t track the level of coolant in your engine or the radiator. Instead, it works as a thermistor, which uses relative temperature difference to determine the amount of coolant flowing through the engine during operation. The temperature difference information is sent from the low water sensor to the car’s computer, where it is used to determine whether there is sufficient coolant or not. If the computer determines there isn’t enough coolant, it turns on a warning light in the dash (the actual light will vary from one automaker to another, so consult your owner’s manual).

The vehicle hood is raised and secured in the open position. The washer fluid is then drained. The windshield washer reservoir is unbolted from the inner fender and removed. The low water sensor is removed from the reservoir and the reservoir is flushed. The new low water sensor is installed in the reservoir which is then reinstalled and refilled with washer fluid The wipers and washers are tested for proper operation.