AC Thermistor Replacement at your home or office.

Our certified mechanics come to you · Backed by our 12-month, 12,000-mile warranty · Get a fair and transparent estimate upfront


Car AC Thermistor Replacement Service

What is the AC Thermistor all about?

Your car’s air conditioning system is actually very complex, and is comprised of a number of essential components. One of the most crucial parts is the AC thermistor. Thermistors are used in all air conditioning applications, from your car to the refrigerator in your home. Essentially, they monitor temperature and control the operation of the system. They work on the basis of resistance – the thermistor’s resistance reduces as heat increases, which allows the car’s air conditioning to cool properly.

Thermistors are sensitive to a wide range of factors, including jostling, dirt and debris. Even a coating of dust can compromise operation and throw off the thermistor’s readings. When this happens, your air conditioner will not work properly. The most common problem is a lack of cooling – the system blows cool air, but will not get cold.

Keep in mind:

  • The AC thermistor is not inspected during normal maintenance.
  • The AC thermistor is not generally inspected during standard evac/recharge services.
  • Troubleshooting thermistor functionality requires experience in both electrical components and AC systems.

How it's done:

  • The AC thermistor is verified to see if it needs to be replaced
  • The defective AC thermistor is removed
  • The new AC thermistor is installed
  • The AC thermistor is tested for operation
  • The vehicle is tested to ensure proper operation of the AC thermistor

Our recommendation:

When you turn on your air conditioning, you expect it to blow cold air for as long as necessary, but if your thermistor is malfunctioning, it might blow cold only for a little while, or not at all. Have any AC malfunction or erroneous operation professionally diagnosed by one of our expert mechanics, and replace the AC thermistor if necessary.

What common symptoms indicate you may need to replace the AC Thermistor?

  • AC blows cold only for a little while
  • AC blows only cool air
  • AC blower eventually stops completely

How important is this service?

While having a working air conditioner isn’t essential to vehicle operation, it is an important convenience feature, particularly during the summer months. Thermistor malfunctions can compromise operation and mimic many other conditions, including low refrigerant. Have a faulty AC thermistor replaced as soon as it is practical.

Fast and easy Car AC Thermistor Replacement service at your home or office.


Recent articles & questions

How Cruise Control Works
The The flashing red and blue lights are behind you. All the traffic passing by you slows slightly and stares just a bit longer than usual. The officer walks up to your window, tears the page from his pad and...
How Do I Prepare My Car for Summer?
Summer's Summer's heat, dust, and stop-and-go traffic will take their tolls on your vehicle. Follow these tips to ensure optimum wellness of your car: Air Conditioning: Have your air conditioning inspected (https://www.yourmechanic.com/services/heating-ac-inspection) by a qualified technician. Newer models have cabin...
Insurance Requirements for Car Registration in Florida
The The state of Florida requires that all drivers carry a minimum liability insurance, or “financial responsibility” on their vehicles in order to operate those vehicles legally. The minimum liability insurance required for vehicle owners under this law is as...

I have no power to the fuel pump or the fuel cut off switch. All fuses are good, what could it be?

Hi there - now that you have checked the fuses (Good job!) check the MFI relay on the under-the-hood fuse & relay box. It controls power to the fuel pump and the engine control unit (ECU). If it is working,...

Cost to install transmission? 2008 Cadillac CTS

Hello - unfortunately, this is not a service YourMechanic offers at this time. I recommend you check with a reputable transmission repair shop in your area for a transmission replacement quote. Thanks for thinking of YourMechanic though!

Volvo s40key was stuck won't crank clicking from fuse box

It may be that you have low system voltage. That might be because of a dead battery, or it might be because of an interruption in the power distribution. But since everything is computer controlled these days, if the system...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com