Thanks Everyone!
WOW - this has been frustrating. The dealer spoke with CycloVac and they will not replace the unit - but are replacing the circuit board and hose. I am going with this as really not much I can do about it. I wanted them to replace the entire power unit as 4 service calls in less then 6 months seems like a lemon to me.
Brian - funny you should say that - I too was wondering if I should just go with a simple system. The issue I have is I like the 4 speeds the system is great on my oriental rugs and throws. I also liked the it told me when to change the bag.
The dealer offered me a MD Silent Master S44 - but it is only one speed and a lot more noise. The power unit is in my Partner's work shop so something that did not cause a headache when running was very important.
Part was ordered today - has to ship from Canada so I am guessing 2 weeks and then I have to get on the service schedule for the repairman to come back out and install it - generally 2 - 4 days after the part arrives.
Again - thanks for everyone who helped me out it is greatly appreciated. Here is a link to the system.
[URL unfurl="true"]http://www.cyclovac.us/vacuum/vacuums/residential-hybrid/central-vacuum-hx615[/URL]