You're on the right track with the # FR85PV but you don't need to pay for all of those parts. Assuming you want to stick with a 13,500 Btu unit all you need is the Furrion Chill HE Replacement RV Air Conditioner # FR82PV. This will plug directly into your Dometic setup so you can use your existing thermostat. If you want to add some additional cooling power the 15,000 Btu # FR42PV is also available. view full answer...