Can a Light Trailer Roof be Reinforced to Install AC Unit on Top?

Updated 03/05/2025 | Published 02/28/2025

Question:

Hello, I just purchased your low profile 13.5 K to install on my Canadian made pro light trailer. The roof is only 1 3/8 inch thick. Is it OK if I build up a frame, including the back feet of the unit just wondering what is the best way to do this?

asked by: Nick K

Expert Reply:

Hey Nick, thanks for reaching out!

You'll definitely want to bulk up your roof in order to better support the Advent Air Low Profile RV Air Conditioner # ASA99YR. We haven't done a project exactly like this, but we did have to reinforce a Transit for a roof vent and I'm linking that video to this page for your reference. You should be able to do something similar, but AC units are heavier, so you'll want to make sure it is very secure.

Let me know if you have any other questions!

expert reply by: Jon G

Nick K.

3/4/2025

Thanks for the great insightJ JON, I reinforced it and it's nice and solid now I have one more question. I hooked up the Air Distribution Box w/ Wall-Mounted Thermostat for Advent Air RV Air Conditioners - White Part Number: ACRG15 WHICH WENT FAIRLY EASY. WHEN I PRESS THE THERMOSTAT BUTTON DOWN FOR THREE SECONDS NOTHING HAPPENS. I'VE TRACED BACK AND I HAVE 120 V GOING INTO THE UNIT. THE 12 V IS GOING INTO THE UNIT AND I HAVE 12 V AT THE THERMOSTAT ITSELF AND YET I CAN'T GET THE THERMOSTAT TO LIGHT UP. ANY SUGGESTIONS ON HOW TO TROUBLESHOOT THIS.

Nick K.

3/4/2025

@NickK Hi Jon... Never mind on the last question… I had the 12 V power cables crossed, this is a Canadian trailer and I keep forgetting that all the wiring is backwards. Once I fix that everything worked. when I turned it on the motor for the fan made a terrible humming sound… I went up, took the cover off, lifted up that foam housing and during shipping it must've bent just enough that it was embedded in the housing simple fixed. Just thought I'd mention if anybody else has a problem with a new one. Once fixed, this thing is incredible. Not that loud and blows incredible cold air. Thank you again for such great service and shipping and especially for you and getting back with our questions. Greatly appreciated.

Jon G.

3/5/2025

@NickK So glad to hear you were able to get everything back up and running! Be sure to check back later and give us an update on how everything is holding up - we'd love to hear more from you!