Different world here. Have a LPG unit Aqua Hot. Runs great and I also run unit once a month. But, no matter how great we do things break. Unit's burner would not come on right when this latest cold weather came in north Texas. Locally RV Service guy not familiar with LPG units. So, off to NIRVC in Lewisville, Texas. Found out there is a fuse in the unit on the Burner Card. Also, that Aqua Hot had a Technical Service Bulletin to replace the Buck Boost (like I know what this is). Since Aqua Hot identify this is a part replacement all cost is owner. I get it, call it a REPLACEMENT PART and not a DEFECTIVE PART. Get it.