How Long Does a Thermostat Last? | YourMechanic Advice

How Long Does a Thermostat Last?

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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.


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Chris

21 years of experience
1861 reviews
Chris
21 years of experience
Mini Cooper Clubman - Brake Pads Replacement (Rear) - Silverado, California
He arrived early, went straight to work, and it should have been quoted higher as it’s a Mini which takes longer than the average break job. He didn’t try to get more than the quoted amount. He even set out to replace a running light for me when he was finished. I thought there would hard sales telling me I needed more work but there wasn’t. Because he didn’t try to sell me more work, I will use him again. When I hired a mechanic I don’t want a salesman. 
Land Rover Range Rover Sport - Brake Pads Replacement (Front) - Irvine, California
Chris again has provided great Service. Everything was great. I was very happy with the work and will definitely have him return for any other work.

Bryant

11 years of experience
408 reviews
Bryant
11 years of experience
Ford Fusion - Brake Pads Replacement (Front, Rear) - Indianapolis, Indiana
Bryant has done great work on my car before, the latest work is no exception. He's very flexible, and goes the extra mile to get you back on the road.
Scion iA - Brake Pads Replacement (Front) - Carmel, Indiana
This is my first time using this service. I am very happy with it. Bryant was very knowledgeable and did quality work. I will use this service more regularly.

Edmar

21 years of experience
184 reviews
Edmar
21 years of experience
Chrysler 200 - Brake Pads Replacement (Rear) - Euless, Texas
Edmar always does a very good job. He's done a few different things on my car the last two years. Each job was performed very fast and top quality. Thank you once again.

Mazyar

7 years of experience
255 reviews
Mazyar
7 years of experience
Jaguar XF - Brake Pads Replacement (Rear) - Lawrenceville, Georgia
He was early, courtesy and actually helped me save some money since i didn't need all the work that i thought i needed done. Honest guy. Very knowledgeable. Great attitude.

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