Loading

Where is the AC temperature sensor located?

The air conditioning (AC) temperature sensor is typically located inside the AC unit, near the evaporator coil. This sensor plays a crucial role in monitoring and regulating the temperature of the air being circulated through the AC system.


Understanding the Role of the AC Temperature Sensor


The AC temperature sensor is a crucial component of the AC system, responsible for measuring the temperature of the air being cooled and circulated throughout the home or building. This information is then used by the AC's control system to adjust the compressor, fan, and other components to maintain the desired temperature set by the user.


The sensor is usually positioned in a strategic location, such as near the evaporator coil, to accurately measure the temperature of the air being cooled. This allows the AC system to make the necessary adjustments to ensure the desired temperature is achieved and maintained.


Common Locations of the AC Temperature Sensor


The AC temperature sensor is typically located in one of the following areas within the AC unit:



  • Near the Evaporator Coil: The most common location for the temperature sensor is near the evaporator coil, as this is where the air is being cooled before being circulated through the ductwork.

  • Inside the Blower Compartment: Some AC units may have the temperature sensor positioned inside the blower compartment, where the cooled air is being drawn in before being pushed through the ductwork.

  • On the Refrigerant Line: In some cases, the temperature sensor may be located on the refrigerant line, which carries the cooled refrigerant from the compressor to the evaporator coil.


The exact location of the AC temperature sensor can vary depending on the make and model of the AC unit, as well as the specific design and layout of the system.


Importance of the AC Temperature Sensor


The AC temperature sensor is a critical component of the AC system, as it plays a vital role in maintaining the desired temperature and ensuring the system operates efficiently. If the sensor is not functioning correctly or is located in an improper position, it can lead to issues such as uneven cooling, temperature fluctuations, and decreased energy efficiency.


Regular maintenance and inspection of the AC temperature sensor, as well as the overall AC system, are essential to ensure the system is operating at its best and providing optimal comfort and energy savings for the homeowner or building occupants.

How do I reset my AC temperature sensor?


How to Reset an Air Conditioner in Four Steps

  1. Power down your AC. Turn off the power at the circuit breaker.
  2. Press the reset button. Most models require you to hold the button down for 3-5 seconds before releasing.
  3. Restore power to your AC.
  4. Listen and monitor.



How much does it cost to replace an AC sensor?


How much does it cost to replace an AC sensor? The cost can vary depending on your AC model and location, but typically ranges from $50 to $250, including parts and labor. Can weather conditions affect my AC sensor's performance? Extreme temperatures or high humidity can sometimes impact sensor readings.



How do I know if my AC temperature sensor is bad?


Symptoms of a bad AC temperature sensor include inconsistent and fluctuating room temperatures, frequent short-cycling (turning on and off too often), or the AC running constantly. Other signs are higher energy bills, unresponsive remote/thermostat controls, and error codes on digital displays. 
Performance and comfort issues

  • Inconsistent temperatures: The air conditioning can't maintain a set temperature, leading to hot and cold spots or air that fluctuates between warm and cool. 
  • Frequent on/off cycling: The system turns on and off much more often than it should, which is also known as "short cycling" and can strain components. 
  • Continuous operation: The AC runs constantly without ever shutting off. 
  • Unusual noises: Strange sounds like clicking or buzzing can indicate a sensor problem, though they can also signal other issues. 

Electrical and cost-related issues
  • High energy bills: The system works inefficiently, leading to a sudden increase in your electricity bill. 
  • Unresponsive controls: The thermostat or remote may not seem to work correctly, or the system may not respond as expected when you adjust settings. 
  • Error codes: Modern AC systems may display an error code that specifically points to a sensor issue. 



Where is the temperature sensor on an AC?


Let's have a look at the wiring first before starting to remove the sensor. And check in the wiring. Then we will get back here to check the wiring. First.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.