Skip the auto shop - Our mechanics make house calls

How Long Does a Thermostat Last?

Thermostat

No matter what kind of car or truck you drive, it has a thermostat in it. This thermostat is responsible for monitoring and regulating the coolant temperature in your vehicle's engine. If you were to look at the thermostat you would see that it is a metal valve and has a sensor built right into it. The thermostat does two things - it closes or it opens - and that’s what determines how the coolant behaves. When the thermostat is closed the coolant is kept in the engine. When it opens, the coolant is then able to circulate. It opens and closes based on the temperature. The coolant is used to prevent your engine from overheating and causing serious damage.

Because the thermostat is always working and always opening and closing, it's quite common for it to fail. While there is no set mileage that predicts when it will fail, it's important to act on it once it becomes faulty. It's also recommended that you replace the thermostat, even if it's not failing, each time you do work on the coolant system that is considered major.

Here are some signs to watch for that can signal the end of the lifespan for your thermostat:

  • If your Check Engine Light comes on, this is always cause for concern. The problem is that you can't tell why it has come on until you have a mechanic read the computer codes and diagnose the problem. A faulty thermostat can certainly cause this light to come on.

  • If your car heater isn't working and your engine remains cold, it could actually be an issue with your thermostat.

  • On the flip side if your engine is overheating, it could be your thermostat not kicking in and allowing the coolant to circulate.

The thermostat is an important part in ensuring your engine is able to operate properly. The thermostat allows coolant to circulate when needed in order to cool down the temperature of your engine. Without this part working, you risk your engine overheating, or not warming up enough. Once the part becomes faulty, it’s important to have it replaced immediately.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
Auto Safety Tips
Driving is more than a way to get from point A to point B. Owning and driving a car can also be a highly enjoyable experience. Whether a person is driving...
P0291OBD-II Trouble Code: Cylinder 11 Injector Circuit Low
P0291 code definition When your vehicle’s PCM registers the P0291 code, it means that a voltage reading came from the fuel injector circuit – for cylinder number 11’s fuel injector –...


Related questions

Q: What Is the Problem When the Check Engine Light Comes On?

The Check Engine Light is on most vehicles built in the last twenty years. The light is used to alert the operator of the vehicle that there is a problem that needs to be looked at as soon as possible....

Q: Why does my car takes about 10 minutes to warn up everytime it sets for a couple of hours

The thermostat may be stuck partly open if it takes longer to warm up than it used to as long and the outside air temperature is not below freezing. If outside air is very cold than the engine would cool...

Q: Coolant not reaching radiator

Hello. If coolant is not reaching the radiator, it is an indication that the coolant is not moving through the system properly. This could be caused by an air pocket in the system or a clogged hose. Another possibility could...