Update - Hot water problem
We called Thor technical support and were told that the water should work at the kitchen sink whether the slideout is in or out - and it has never worked with the slideout in. Apparently, there has been a kink or crimp in the water line since delivery of the vehicle 14 months ago. The tech kindly emailed us a schematic diagram of the water system and we think we know where the problem is now.
If you have a Freedom Elite 28H or Thor 28Z make sure your water system is working even with the slideout in. If not, you may have the same issue we are having!