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​RV AC Not Turning On



If your AC isn’t turning on in your RV, it might be due to a number of problems that can make it more difficult for you to handle the repairs yourself. Consider:

  • The AC is connected to a few different systems. To diagnose the problem, you’ll have to have a working knowledge of an RV’s electrical, electronic, and mechanical systems.
  • There can be differences across AC brands and products. If you’re looking for a “quick-fix” solution, you’ll often find that you need to find it specifically for a problem you’ve already diagnosed in an AC unit of your exact specifications.

With these challenges in mind, what can you do to fix an RV AC that refuses to turn on?

Diagnosing The Problem

The first thing to do is to undertake a little troubleshooting:

  • Switch off the electrical supply. To work safely with an AC unit, you need to first shut off the electrical supply. You can do this by tripping the breaker or unplugging your motorhome if that’s how it gets its supply.
  • Diagnose the problem. Is it that your AC isn’t getting any power? Or is it that it has power, but won’t blow cool air? First evaluate the problem itself to get a sense of which stage may be affecting the AC’s performance. You may even find that you have to check the thermostat performance.
  • Familiarize yourself with the AC parts. What’s the difference between the control board and the capacitor? A capacitor is a small, cylindrical object for storing energy, while the control board will more likely resemble a computer board. If you understand what the capacitor does, you’ll be more likely to diagnose a power supply problem rather than scratching your head.
  • Check for power first. If the problem is that the AC unit doesn’t seem to react to anything you’re doing at all, it might be an issue with power. Look at the panel and check for blown fuses. You may also look for signs like a motor home’s lights or vent fans being out, which points to deeper power supply issues that may not have to do directly with your AC.

If, on the other hand, there’s plenty of power in the RV but not the AC itself, you’re going to likely have to consider problems with the capacitor that may need replacing.

When To Hire A Professional

If you’re capable of diagnosing a problem with a control board, for example, and replacing it yourself, repair can be as simple as disassembly and reassembly. The problem is that casual RV owners usually don’t have the knowledge or experience to handle these troubleshooting issues themselves. If you’ve given your AC a thorough inspection and checked your power supply, it may be time to hire a professional to take care of your RV’s AC problem.

Want more ways to maintain your RV and ensure it’s always in great shape? Visit all the RV products available here at RV by LIFE.


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Life Industries Corporation
4060 Bridge View Drive
N. Charleston, SC 29405
United States of America

toll free: (800) 382-9706
local: (843) 566-1225
fax: (843) 566-1275


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