[rheavn]

Good advice so far. Has a service been done within a year? If not or you don't know it is time. During the service, check your mixing valve as it may be responsible for less than hot water and/or heating air. Here is a guide for the annual service:

http://newellgurus.com/Thread-AquaHot-annual-service

If you are coming to the rally you could have Rudy Legett go through your system with you. He is all around good guy & authorized AquaHot service tech! He is also giving a seminar on AquaHot units at the rally. This way when you leave the rally you would know your system was working properly.