Error T132 means the water heater can not satisfy the demand for hot water. The following steps can help you check the issue.
Check for open faucets.
Check for water leaks.
If none present, the unit may be improperly sized.
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.