Error A107 means that the system has detected water in the drain pan. The following steps can help you check the issue.
Check for obvious water leaks (If the leak is present, service for unit leakage).
If obvious leakage is not present, disconnect the rope sensor from the board, and if the code is no longer present, dry (a blow dryer is an acceptable method) or replace the rope sensor.
If the error is still present once the rope sensor has been replaced, the board will need to be replaced.
Press and hold the "Clear Alarm" button for 5 seconds to override the alarm for 24 hrs.
Zwell is dedicated to getting homes closer to net zero through the installation of new energy-efficient hybrid water heaters. We are not currently equipped to do service or repair visits but we want to be as helpful as possible. Feel free to reach out to us here or for more information, you can contact the Rheem Hybrid Technical Services Department at 800-995-0982.