How Long Does an AC Thermistor Last?

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Your car’s air conditioning system is very complex, and made up of several essential parts. One of the most important is the AC thermistor. No AC system can operate without it, whether it’s the AC system in your car, or your home climate control system. The thermistor works to monitor the temperature by measuring resistance – as the heat in your car increases, the thermistor’s resistance drops, and that’s what makes your car’s AC system keep you cool.

Of course, you don’t use your AC every day, unless you live in a really warm climate. The life of the thermistor, though, doesn’t depend so much on how often it is called into action as it does other types of wear and tear. It is an electrical component, so it is vulnerable to dust and debris, corrosion, and jostling. The life of the thermistor will depend less on its age than on the conditions in which you drive – rough, dusty roads, for example, can reduce the thermistor’s life. Generally speaking, though, you can expect the AC thermistor to last about three years.

Signs that your AC thermistor may need replacing include:

  • System blows cool, but not cold, air
  • Cold air blows only for a little while
  • AC stops blowing air

Problems with the thermistor can mimic other issues in the AC system, so if you are having difficulty with your car’s AC system, you should have it checked out by a qualified mechanic. A professional mechanic can do a thorough analysis of your air conditioning system, identify the problem or problems, and if necessary, replace your AC thermistor.


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Michael

15 years of experience
518 reviews
Michael
15 years of experience
Mercedes-Benz GL450 - Brake Pads Replacement (Rear) - Atlanta, Georgia
Micheal was punctual and friendly. Work was completed within promised time. Will definitely use again.
Volvo S80 - Brake Pads Replacement (Front) - Roswell, Georgia
Michael was SUPER QUICK with doing my brake and rotors. Great communication throughout the whole process. Will always recommend

Kenneth

19 years of experience
509 reviews
Kenneth
19 years of experience
Toyota Sequoia - Brake Pads Replacement (Front) - Newport Beach, California
Kenneth did a great job and very knowledgeable. He has a great attitude and I will for sure be using him again.

Chuy

13 years of experience
129 reviews
Chuy
13 years of experience
Honda Civic - Brake Pads Replacement (Front, Rear) - Cicero, Illinois
Excellent work on doing the breaks for my car and the break and steering system flush I’ll definitely recommend and take into consideration for chuy’s work whenever I need a fix on my car

Richard

16 years of experience
72 reviews
Richard
16 years of experience
BMW 328i - Brake Pads Replacement (Rear) - Dublin, California
Richard was an outstanding mechanic. After he arrived, the first thing he did after taking the initial pictures of the car is an assessment into what work was asked. He quickly verified that I did not need brake fluid and my front brakes even-though it affects his personal commitments and time, which I think is highly appreciate and thorough professional. He was detailed oriented - took time to make sure that all the issue are fixed. He paid attention to detail in overall car assessment- he goes above and beyond. He was also teaching me through the process which I found highly educational and appreciate him providing the information ensuring and making me comfortable what he was doing and explaining patiently all the questions that was thrown at him. When he works - you know he's highly skilled and experienced and knows his stuff. He is highly experienced. He is a "Master" mechanic in true sense :)

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