Dometic 15K A/C Blowing Warm/Hot Electric Smell?

My first guess would be the start up capacitor. A fairly easy and inexpensive fix. If you are reasonably mechanically inclined and feel comfortable getting on the roof you can change it in probably 20 minutes and, that includes the climbing time.

If you decide to do this make sure you short the electrical terminals on the capacitor together before touching the capacitor as they can bite.