2010 Coleman Mach AC issue

[Gish]

Greetings,


My roof mounted a/s only works on the low blower setting both fan and a/c.
When I switch it to high fan, it still blows at the same low speed. When I use the fan it will run uninterrupted. When I switch it to a/c the blower will stop running after 10 min. I have had the run capacitor changed and the issue has not resolved. A technician came out and is not sure what the issue is and says it's not worth trouble shooting it because the labor costs could go towards a new unit, which it's anybodies guess how far out that will be with them being on back order. The compressor works and the fans are not seized up. I am very hesitant on replacing the unit when it could be a small repair. Does anyone have any ideas or suggestions please? Thank you.