How to Bypass Evaporator Temperature Sensor

How to Bypass Evaporator Temperature Sensor

If your car’s air conditioner isn’t working properly, there may be a problem with the evaporator temperature sensor. This sensor is responsible for regulating the temperature of the evaporator, and if it isn’t working correctly, the air conditioner will not function properly.

Luckily, you can bypass this sensor to get your air conditioner working again.

  • Disconnect the evaporator temperature sensor from the wire harness by unplugging it or cutting the wires
  • Bypass the evaporator temperature sensor by connecting the two wires together with a jumper wire or a piece of bare copper wire
  • Wrap the connection in electrical tape to insulate it and prevent any shorts
  • Reconnect the wire harness to the evaporator temperature sensor

How Do You Bypass Ac Temperature Sensor?

If your car’s air conditioner isn’t blowing cold air, the first thing you should check is the AC compressor. If the compressor is not working, it could be because the temperature sensor is not working properly.

In this article, we will show you how to bypass the AC temperature sensor so that your car’s air conditioner will start blowing cold air again.

The AC temperature sensor is located in the evaporator core. When the refrigerant in the evaporator core gets too cold, the sensor signals the compressor to turn off. This prevents the refrigerant from getting too cold and freezing up the evaporator coils.

However, if the sensor is defective, it can cause the compressor to turn off prematurely, preventing the air conditioner from cooling properly.

To bypass the AC temperature sensor, simply disconnect it from its wire harness and ground it to a good ground point on your car’s frame. This will fool the sensor into thinking that always cools down no matter what the actual temperatures are like inside your car’s cabin.

As long as you don’t mind having your air conditioner run constantly, this workaround will keep you cool all summer long!

How to Test Evaporator Temperature Sensor

An evaporator temperature sensor is used to measure the temperature of the air inside a refrigerator. This sensor is located in the evaporator, which is the part of the fridge where the air is cooled. The evaporator temperature sensor measures the temperature of the air passing through it and sends this information to the fridge’s control panel.

The control panel uses this information to regulate the fridge’s cooling system. To test an evaporator temperature sensor, you will need a digital multimeter that can measure AC voltage. Before you begin, make sure that your refrigerator is turned off and unplugged.

Locate the evaporator temperature sensor in your fridge. It will be located near the evaporator coils. Use your multimeter to check for continuity between the two terminals on the sensor.

If there is no continuity, then your sensor is defective and needs to be replaced.

How Much Does It Cost to Replace Evaporator Temperature Sensor?

Assuming you would like an estimate for a mechanic to replace an evaporator temperature sensor: The cost of replacing an evaporator temperature sensor will vary depending on the make and model of your car. However, on average, it should cost between $200 and $400 to have a mechanic replace the sensor.

If you are comfortable doing the work yourself, you can purchase a replacement evaporator temperature sensor online for around $50.


The evaporator temperature sensor is responsible for measuring the temperature of the evaporator so that the air conditioner can adjust the cooling accordingly. If this sensor is not working properly, it can cause the air conditioner to either overcool or undercool the cabin.
Thankfully, there is an easy way to bypass this sensor if you need to use your car’s air conditioner in a pinch.

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