Wiring Diagrams for Advent Air Low Profile AC and Air Distribution Box/Wall Thermostat
Updated 01/05/2026 | Published 09/09/2024
Question:
I recently purchased a advent ac ADV79R, and the Distribution ACRG15 to go with it, replacing a Duo-Therm 620426.331. With that it changed out my old analog t-stat with the digital one that came with the new unit. I hooked up the new t-stat with the four wires coming from the control box, the 120 volt ac, but cant figure out how to hook up the remaining 3 wires coming from the control box 12v+ 12v-, and the brown wire to furnace when i have 4 wires coming up from the furnace plus the 12 volt positive coming from coach power. Can you help please!!!!!!
asked by: Robert
Expert Reply:
Hey Robert, thanks for reaching out!
I'm attaching the wiring diagrams for the Advent Air Low Profile RV Air Conditioner # ADV79FR and the Air Distribution Box w/ Wall-Mounted Thermostat # ACRG15. You'll need to confirm what wires are on what functions from your older Duo-Therm system and connect them accordingly as I don't have a diagram for that to compare this to.
(click to enlarge)
(click to enlarge)
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Jameson C.
1/5/2026
Hey Robert, were you able to get the wiring sorted out between the Advent Air system and your furnace? Knowing how the connections worked out could really help others updating from a Duo-Therm setup.