How do I know if my evaporator temperature sensor is bad?
Symptoms of a Bad or Failing Evaporator Temperature Sensor (Switch)
- No cold air from the AC system. One of the first symptoms of a potential problem with the evaporator temperature switch is no cold air from the AC system.
- AC temperature fluctuates.
- AC compressor does not activate.
Where is the evaporator temperature sensor located?
It’s commonly located on the passenger side on most cars, trucks, and SUV’s. Most of the time, the sensor is located towards the rear of the condenser (or closer to the rear of the vehicle as opposed to the front end).
How do I change the evaporator temperature sensor switch?
- Step 1: Locate the evaporator sensor.
- Step 1: Disconnect the negative battery cable.
- Step 2: Remove the sensor electrical connector.
- Step 3: Remove the sensor.
- Step 1: Install the new evaporator temperature sensor.
- Step 2: Reinstall the electrical connector.
- Step 3: Reinstall the negative battery cable.
How does evaporator temperature sensor work?
If the sensor detects that the temperature is approaching high temperatures, the AC system increases flow through the system to increase cooling. It reduces flow when it detects that the evaporator is cold to conserve power and prevent it from freezing over.
How do I know if my evaporator is bad?
A broken air conditioner may be a result of a faulty AC evaporator….4 Symptoms of a Bad or Failing Air Conditioning Evaporator
- The cool air is weak or no cold air is blowing at all.
- You notice a strange odor when using your AC system.
- The AC compressor will not activate.
- The AC temperature will vary.
What is the evaporator temperature?
The evaporator coil is cold (about 40° F), and the air from the house is warm (about 75° F, depending on where you set your thermostat). Heat flows from warmer to cooler, so the air temperature drops, and the refrigerant picks up the heat lost by the air. This is the second law of thermodynamics in action.
Can you repair a leak in an evaporator coil?
In order to replace the coil and fix your evaporator coil leak, a technician will need to recover the remaining refrigerant gas, and solder in a new coil after dismantling the air conditioner. A filter / drier must also be added or replaced to absorb moister and contaminants.
What are the symptoms of a clogged evaporator core?
Weak or no airflow. Cold air (not warm) coming through the vents when the heater is on. Coolant leakage visible inside the cabin or a damp smell.
How to remove an evaporator temperature sensor ( switch )?
Most sensors are screwed into the AC condenser and held onto the sensor by a secondary clip. To remove the sensor, you’ll need to remove the support clip first. After the clip has been removed, you can unscrew the sensor by pressing down and turning the switch to the left. Step 7: Remove electrical harness from the old EVAP temperature sensor.
Is the thermostatic switch on the evaporator actually a switch?
As far as I know, the so-called “evaporator thermostatic switch” isn’t actually a switch; it a temperature sensor on the evaporator that’s connected to the engine control module which, in turn, controls the operation of the AC compressor.
What are the symptoms of a bad evaporator switch?
Symptoms of a Bad or Failing Evaporator Temperature Sensor (Switch) Common signs include lack of cold air coming from AC, temperature fluctuations, and the AC compressor not activating. by Ed Ruelas on January 07, 2016 1.
How is the temperature of an evaporator controlled?
The operation of this luxury feature is controlled by a very small sensor called the evaporator temperature sensor or EVAP temperature switch.