Troubleshooting 13,500 Btu Advent Air RV Air Conditioner Not Blowing Cold Air

Updated 10/15/2025 | Published 07/09/2019

Question:

Just purchased a new advent ACM m135 air-conditioner. installation was easy. connected the inside unit but the air-conditioning fan goes on but does not blow cold air

asked by: Jo

Expert Reply:

I reached out to my contact at Advent who said that there are a variety of things that could be causing the issue you are experiencing with the Advent Air RV Air Conditioner # ACM135C. Some of these include problems with the ducts, not taping everything off correctly, or possibly no voltage to the blue wire for powering the compressor. If you are familiar with troubleshooting AC units then you can check these things otherwise it would be best to take your setup in to a service center as they would know what to look for.

expert reply by: Jon G

Ben

5/23/2024

are you referring to the blue wire on the wire harness that plugs in on the inside of the camper? that is the only blue wire I am seeing.

Jon G.

5/23/2024

@Ben Yes, that would be the one.

Sherman

7/24/2024

@JonG I’m having the same issue. Installed it yesterday and it’s not blowing cold air even a little. I’ve wasted my money and I live in Texas. I’ve troubleshooted like crazy. Researched and backtracked. Looked over it a thousands times. The unit is probably just defective but I also hear this is a problem with advent units.

Essence

8/2/2024

@Ben were you able to remove this issue?! Was it in fact the blue wire?!

Essence

8/2/2024

My situation is similar but I had this unit installed atop a Chevy step van. Would the same issue apply to me?! My truck is wired for solar power so it turns on and everything but it only blows warm. Does this mean this unit was never suitable for anything but an actual RV, which has the blue wire?!

Jon G.

8/7/2024

@Essence The blue wire just has power ran to it to run the compressor. So if that blue wire isn't hooked up then that would explain why yours isn't getting cold - it's because the compressor isn't receiving power.

Jeremy B.

10/15/2025

fault codes for t stat

Jon G.

10/15/2025

@JeremyB What kind of code are you getting? And I'm guessing you have an Advent AC unit? If you can verify the model as well that would be really helpful!