You said you have a new coach....not sure what brand. You might check with the manufacturer (both coach and seat) to see if they can answer your question re moving the seat manually. I have fooled with a couple of malfunctioning power seat motors on passenger cars/light trucks over the years. Since they were gear drive, there was no way of moving the seats without electrical power. However, failures of newer power seat motors is very rare....it is usually an electrical failure somewhere else, like others have mentioned.
Good question. If you contact the manufacturer(s), please let us know what you find out.....thanks!
2003 Fleetwood Revolution DP