Updated now, How to tell what A/C has for starting

If you provide Make and complete Model Number, and you know nobody had repaired or modified it, one of our tech members may be able to tell you.

In my case, Chris Bryant was able to tell me that of the three possibilities

1. No Start Assist
2. Start Cap with PTCR
3. Start Cap with Potential Relay

that our Coleman Mach 15 had Start Cap with Potential Relay.

If you're trying to start A/C with anything less than a legitimate RV extension cord, that's likely to be your problem.