Replacing A Dometic RV Air Conditioner Rooftop Unit With An Advent Air Unit

Updated 04/17/2023 | Published 04/15/2023

Question:

I’m having some problems getting the wiring right I had a dometic unit in my trailer and replacing it with an Avnet one and can’t seem to get it to work properly

asked by: Mycal M

Expert Reply:

If you're replacing just the rooftop unit of your Dometic system with the Advent Air # ACM135 then it's a super easy swap out. You'll just need to trace the wire harness of the old rooftop unit to the controller. It's going to have a 6-pin or 9-pin connector to plug into the controller. If the old unit has a 9-pin connector then you'll just need an adapter # ACCOLKIT. I've attached a short video below where I'll show you the wire harness and controller.

If your old Dometic system had a heat pump then you will be losing this function since it's inside of the rooftop unit and there is not one in the Advent Air units.

If this is what the issue is then I'll need a bit more of a description on what you've done so far and what is working in order to troubleshoot the issue.

expert reply by: Kevin C