You might want to contact Aqua-Hot they have experienced technicians that are available to answer any technical questions you may have, help you with parts questions and ordering and help you locate an Aqua-Hot Factory Authorized Service Center. They deal with these sort of things often and can probably tell you the exact problem quickly. Once you get it figured out and taken care of please come back and share with us all!
Aqua-Hot Technical service department
Phone: 800-685-4298
Email:
servicedept@aquahot.com
Hours: 7:00 a.m. to 4:00 p.m. Mountain time