I am so sorry you are not happy with your purchase. The RTEX-04 is the smallest electric tankless water heater there is. I am not sure what you are using for, but it is for a single hand sinks only, and a at minimal temperature rise. That said if it is not working it is fully under warranty. Please contact Rheem Technical support at 1-800-432-8373. Be by the unit when you call. If it is defective and not working send me an email with case # and a photo of the unit's rating plate and new unit will be sent.
