RV AC Not Cooling? Know How to Troubleshoot the Problem

If your RV air conditioner is not cooling enough as well as it used to, there are a few things you can check to try and fix the problem. In this blog post, we’ll go over some of the common issues that can cause an RV AC unit to not cool properly or an RV AC to stop working, as well as what you can do to troubleshoot and hopefully fix them. So if your RV AC is not blowing cold, keep reading for some helpful tips! But before diving into thai discussion, let’s have  a brief overview on how an RV AC works.

How Does An RV Air Conditioner Work? 

If you’ve ever been inside an RV on a hot day, you know that the air conditioner is a lifesaver. But how does this machine manage to keep the whole RV cool? The answer lies in the way that it circulates air. Most RVs have a forced-air circulation system, which uses vents to push cool air into the different rooms.

The air conditioner itself is located in the main living area, and it works by drawing in warm air from outside and passing it over a set of coils. These coils are filled with a refrigerant, which absorbs the heat from the air and cools it down. Then the cool air is circulated back into the RV, creating a comfortable environment for all passengers.

What Are The Problems You May Face If RV AC Stops Working?

Common RV Air Conditioner Problems

Any RV owner knows that the AC is essential for comfortable summertime camping. However, when the AC isn’t working properly, it can spoil a perfectly good vacation. One of the most common problems RV owners encounter is an AC that is not cooling properly. This can be caused by a variety of issues, including dirty coils, low refrigerant levels, or damaged air ducts. In some cases, the problem may be as simple as a blown fuse. And when the AC stops working or not cooling enough yoru RV, you may face these problems:

  • It will be extremely hot inside your RV. This can be dangerous, especially if you have young children or elderly passengers with you. 
  • Food may get spoilt more quickly in the heat
  • you may find it difficult to sleep
  • your RV battery will run down more quickly if the AC is not working, as it will have to perform harder to keep the interior cool.

If you find yourself in this situation, it is important to stay safe and cool by opening windows and using fans to circulate air. You should also contact a qualified technician to repair your AC unit as soon as possible.

How to Troubleshoot The Issue of The RV Ac Not Cooling

Troubleshoot The Issue of The RV Ac Not Cooling

If your RV AC is not cooling, don’t worry! You’re definitely not alone. A lot of people have this problem and it can be frustrating. But don’t give up yet; there are a few things you can do to try to troubleshoot the issue. Keep reading for some tips on how to fix your RV AC.

1. Parking the RV in the Shade Is a Good Idea

The most obvious reason to park your RV in the shade is to keep it cool. If your RV is in direct sunlight, it can quickly become quite hot inside, even with the AC running. This can make it uncomfortable to be in and put a strain on the AC unit, making it work harder than necessary. You may even find out the dometic ac compressor is running but not cooling. So, if you’re trying to keep the AC in your RV working properly, parking the RV in the shade is always a good idea.

2. Make Sure the Windows and Roof Vents of the RV are Insulated

Before you take your RV out on the open road, it’s important to make sure that it is properly insulated. This will help keep the interior of your RV cool in hot weather and warm in cold weather. One of the best ways to insulate your RV is to add insulation to the windows and roof vents. This will help keep the heat out in summer and the cold out in winter. So, if you’re looking for a way to improve the comfort of your RV, be sure to add insulation to the windows and roof vents.

3. Avoid the Presence of High Humidity

If the humidity level in your RV stays unchecked for long, it can cause moldy smell, fungal growth, rust, rot and an uncomfortable ambiance inside an RV.  And all these can seriously damage the AC evaporator coil. Due to the high level of humidity, the evaporator coil in the AC unit stops holding water vapor , moisture enters through the cooling system and as a result, the coil gets iced up. To prevent this from happening minimize the overall humidity level in your. You can even run the fan at full speed when the weather outside is hot and humid.

4. Fix Broken Thermostat

When the thermostat is broken, it can’t accurately regulate the temperature of the coolant, which can cause it to freeze. This can lead to a loss of refrigerant, resulting in the AC system working less effectively. In severe cases, it can even cause the AC compressor to fail. As a result, it’s important to get a broken thermostat fixed as soon as possible to avoid any damage to your RV’s AC system.

5. Check Whether The Air Filters are Clogged with Dirt and Debris

Many RV riders don’t realize that their air conditioner has an air filter, let alone that it needs to be replaced or cleaned on a regular basis. Over time, the air filter becomes clogged with dust and debris, which can impede airflow and reduce the efficiency of the unit. In some cases, it can even damage the air conditioner. To avoid these problems, it’s important to clean or replace the inside air filter on a regular basis. This is usually a simple process that takes just a few minutes. However, if you’re unsure of how to do it, there are plenty of instructions and videos available online. By following the simple steps, you can help ensure that your RV’s air conditioner will continue to perform at its best.

6. Keep the Coils or Fins Dirt-free

keep clean the Coils or Fins

If your RV’s air conditioner isn’t cooling as well as it used to, one of the important things you should check is the coil or fin. These can get dirty over time, which makes it harder for the air conditioner to do its job. 

 To clean the coils or fins, you will need a few supplies. These include:

  • A soft brush or microfiber cloth
  • Distilled water
  • Mild detergent 

The process of cleaning includes these steps:

  • Turn off the power to the AC and clean the coils or fins with a soft brush and soapy water. 
  • Rinse the coils or fins with distilled water and let them air dry.

Once you’ve cleaned the coils or fins and cleared away any debris, your RV’s air conditioner should start cooling better.

7. Ensure Your RV Has Adequate Power

Ensure Your RV Has Adequate Power

There’s nothing worse than being in your RV on a hot day, and finding out that your AC isn’t working. If you’ve ever been in this situation, you know that it can quickly turn into a nightmare. But don’t worry, there are ways to ensure that your RV AC works properly for keeping you cool. First, make sure that you have enough power. If you’re plugged into an outlet, check to make sure that the voltage is high enough. If you’re running off of a generator, make sure that it’s properly fueled and that the oil levels are good.

8. Make Sure Your Generator Is in Good Working Condition 

If you’re planning on spending any time in your RV this summer, then you’ll want to make sure that your generator is in good condition. After all, you’ll need it to run your air conditioner – and nobody wants to be stuck in a hot, stuffy RV! Luckily, tuning up your generator is relatively easy to do. Just make sure that you change the oil and oil filter, as well as the air filter. You should also check all of the hoses and belts for wear and tear. And don’t forget to top off the fuel tank so you’re ready to go when summer rolls around. By taking a few simple precautions, you can ensure that your RV will be cool and comfortable all season long.

Final thoughts,

Have you ever gone on a road trip in your RV and found that the air conditioning wasn’t cooling properly? If so, you know just how frustrating it can be. After reading this post, I hope you are now aware of some of the most common problems that arise when an RV AC isn’t cooling, how to troubleshoot the problems and solve the problems by yourself. If you’ve encountered any of these issues or have any other tips to share, please leave us a comment below. We would love to hear from you!


1. How do you reset an RV Air Conditioner?

The best way to reset an RV air conditioner is to first check the circuit breaker. If you find out that the breaker has been tripped, you need to reset it and try to turn it on again. If the air conditioner still does not work, then you may need to troubleshoot the air conditioner itself. There are a few things that could be going wrong, such as a dirty filter or blocked vents. Once you have determined the problem, you can take the necessary steps to fix it and get your RV air conditioner up and running again!

2. Why is my RV AC blowing warm air?

There could be a few reasons why your RV AC is blowing warm air –

  • One possibility is that the compressor is not running. If the compressor isn’t running, it means that the refrigerant isn’t being circulated, and so the AC unit won’t be able to cool down the air.
  • Another possibility is that there’s something blocking or impeding the airflow. This can be caused by anything from dirty filters to an obstruction in the ductwork. If there’s something blocking or impeding the airflow, it will prevent the AC unit from cooling down the air as efficiently as it should.

3. Can I run my RV AC all night?

You can certainly run your RV AC all night long if you need to! There are a few things to keep in mind, though. Mainly, you want to make sure that you’re not running your RV generator too long – otherwise you might end up damaging it. Secondly, you’ll want to keep an eye on your power usage and try to conserve as much electricity as possible.

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