What is a low water sensor replacement?
Your low water sensor kind of works like a thermometer. If you have a leak in your engine, radiator, or reservoir, your low water sensor will detect the lowered levels of coolant by identifying abnormal temperatures throughout the system.
The low water sensor then sends that information to the car’s computer, which initiates the check engine light if necessary.
If the leak goes undetected, your low water sensor may be to blame, in which case it’s time to get a replacement.
How to replace a low water sensor
A mechanic will usually complete the following steps to replace your low water sensor:
- Drain the washer fluid
- Unbolt and remove the windshield washer reservoir from the inner fender
- Remove the low water sensor from the reservoir
- Flush the reservoir
- Install the new low water sensor into the reservoir
- Reinstall the reservoir and refill with washer fluid
When do I need to replace my low water sensor?
There are two situations in which you need to replace your low water sensor:
- Your car is giving unpredictable or uncharacteristic coolant level warnings
- The low coolant warning pops up on your dash, even if you have a full and functional system.
If your warning light appears, you will still be able to drive, but beware: you could overheat your engine if you wait too long to bring your vehicle to a mechanic.
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