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Trane ac error code e3

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Trane ac error code e3

 

The E3 error code on a Trane AC unit usually indicates a problem with the unit’s temperature sensor. This error can occur when the temperature sensor malfunctions or disconnects from the unit’s control board.

Here are some steps you can take to troubleshoot the E3 error code on your Trane AC:

  1. Turn off the unit and unplug it from the power source.
  2. Check the temperature sensor to see if it is loose or disconnected. If it is, reconnect it to the control board and secure it.
  3. If the temperature sensor appears to be connected properly, use a multimeter to test the sensor’s resistance. The resistance should match the manufacturer’s specifications for the sensor.
  4. If the temperature sensor tests within the correct range, the problem may be with the control board. In this case, you should contact a professional HVAC technician to diagnose and repair the issue.

It’s important to note that attempting to repair an AC unit alone can be dangerous and may void the unit’s warranty. If you’re not comfortable troubleshooting your AC unit, it’s best to contact a licensed professional for assistance.