Symptom:  When trying to pair the Recon controller with the ERV/TM7 via Bluetooth, it does not detect any Bluetooth devices (WACHS MACHINE) after it has finish searching.

 Possible Causes:

  1. Bluetooth module related:
    1. Bluetooth module not installed
      1. Open the control box on ERV/TM7 and make sure there is a Bluetooth module attached on the circuit board. It should have a blue LED light blinking (when power is ON).
    2. Bluetooth module shorted 
      1. If there are signs of moisture or water inside the control box most likely the Bluetooth got shorted (LED lights might still be blinking). Even with no moisture it can be shorted if some of the pins touch each other. 
        1. REPLACE