Error A200 means the ECO tripped and the heater was disabled. The following steps can help you check the issue.
- Disconnect power to the unit.
- Check elements from screw to ground.
- Check resistance to thermistors.
- If the issue is neither the elements nor thermistor, replace the board.
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.