I've got a 2007 Tiffin Phaeton 35DH and have the same intermittent (very frustrating) air compressor alarm problem. I've read about the LBCU and was planning to call Freightliner today, give them my VIN and see what they tell me but based on what MARKLETHERIDGE said above that he replaced that and it didn't fix the problem I'm worried I'd be spending good money for nothing. That said, I've hear that others have replaced the LBCU and if fixed their problem...Any word on whether or not the VDU was in fact your problem on your 2008 Fleetwood Discovery? Thanks
