How to Keep Rv Air Conditioner From Freezing Up

One of the most common problems with RVs is that their air conditioners often freeze up. This can be due to several reasons, but there are ways to keep your RV’s air conditioning from freezing up. The first thing you should do is make sure your unit stays clean and free of debris.

How to Keep Rv Air Conditioner From Freezing Up

When dirt builds up on the coils, it causes them to clog and reduces airflow, leading to ice buildup in the condenser coil or evaporator coil. One way to combat this problem is by using a vacuum cleaner attachment on your hose nozzle (be careful not to suck any water into the system).

Another great idea for keeping dirt out of your RV’s AC system is by installing a filter in front of it before it enters the ductwork. In this article, we’ll explore how to keep RV air conditioner from freezing up.

10 Steps to Follow on How to Keep Rv Air Conditioner From Freezing Up 

Step One: Don’t Let Freeze Up for the First Time

The first rule of thumb to follow is that you don’t want your RV air conditioner freezing up in the first place. This typically happens when you’re out camping, and it’s always best to be aware of what time of year it is before setting off. Springtime, fall, and winter are the worst times for this, so you have to be prepared.

If it’s going to be a hot summer day in your area when you’re camping, then there’s no need to worry about freezing because your RV air conditioner won’t freeze up at all. However, if it’s going to get cold outside while you’re out there, then you need to do something about it now.

Step Two: Clean Out the Drain Hose

The drain hose is essential for any RV air conditioner because debris will build up in it over time. Unfortunately, this can cause it to freeze up, which makes your RV air conditioner very inefficient and ultimately useless. 

Clean Out the Drain Hose. Find Out Where the Drain Hose Is

If your drain hose is obstructed, it can also back up all the water from the condensed pan and flood the floor of your RV. So the first step to fixing this issue is to find out where the drain hose is. Heading outside with a flashlight is usually necessary for this part of the process.

Step Three: Check the Thermostat

Your thermostat plays an essential part in how to keep RV air conditioner from freezing up. This is where it will tell you if the drain hose is blocked somewhere or not, which makes it easy to find out what’s going on with your RV air conditioner.  Most of the time, it will be a red cord coming out and going to the wall.

If this isn’t working, or if you can’t see one, look inside the air conditioner where the hose goes into your RV. The thermostat is usually just sitting in there on an arm that operates when you change between heat and cool. If the cord is plugged in and your RV air conditioner freezes up, it may be because your thermostat has gone bad.

Step Four: Getting Rid of Those Condensation Lines

The condensation lines can be a pain at times. It usually means that your drain line is clogged somewhere or you’re running too many things at once at the same time. This may cause it to freeze up, which can make your RV air conditioner not work at all.

To prevent this from happening to you, look for any sources of water in your RV that could potentially be clogging the drain hose somewhere. The most common source for this is kitchen sinks because they’re typically used while cooking while your RV air conditioner is working.

Step Five: Look for Any Leaks

Leaks are common in just about every RV, so this shouldn’t be anything new. If you can find where the water is coming from, you can usually stop it just by leaking around your RV air conditioner. However, if it’s still freezing up despite having no leaks, something else may be going on.

Leaks Are Common in Just About Every Rv. So, Look for Any Leaks

To fix this, try some RV antifreeze to ensure that the drain line doesn’t freeze up while you’re camping in cold weather. This should stop it from happening unless more problems pop up with your RV air conditioner, but at least it will be usable and free of leaks.

Step Six: Get the Condenser Temperature Down

If you have any issues with your RV air conditioner freezing up, this is typical of what causes it. If you cannot get the condenser temperature down without putting in a lot of time and effort, it’s probably best to contact an RV repair service for more advice on what can be done.

However, if you feel like you’re able to get your condenser temperature down without much of a problem, it should be simple. Set the thermostat lower into the room that contains your RV air conditioner so that it’s not trying to work as hard. This should help reduce any chance of freezing up so that your RV air conditioner is starting to work properly.

Step Seven: Get the Condensed Water Outside

If nothing seems to be working for you, then you’re going to need to get the condensed water outside of your RV. The easiest way is by attaching a garden hose to it and running it out into the ground or over into a drain that won’t create any problems. This should get rid of any chance that the water will freeze up if it’s not draining right.

Also, you can get rid of condensation by running the air conditioner in your RV more often. This causes any condensed water to drop back down into the drain hose instead of freezing up where it is. It may be challenging to do this because having an RV air conditioner on uses a lot of electricity, but it’s the only way to get rid of the water if your drain hose is being blocked somewhere.

How Do You Clean the Coils on an Rv Air Conditioner?

The A/C in your vehicle works similarly to that of your home A/C. You have coils and a fan that blows through the coils to move the air into the passenger compartment. The difference is that there is usually only one coil and it’s located at the front of the engine compartment, while an Rv will have two coils.

One is located at the front of the engine compartment and one at the rear, near where the water holding tank is located. From time to time, you will need to clean your A/C system if it’s not operating correctly or if you are adding additional refrigerant to maintain it at two pounds per square inch.

This is because the A/C acts as a pump, and it will be able to move the proper amount of refrigerant if the coils are clean and free from oil and dirt. Thanks for reading about how to keep RV air conditioner from freezing up.


To keep an RV air conditioner from freezing up, make sure to install it in the right location. For example, suppose you have installed your RV air conditioning unit in an enclosed space with no ventilation or outside of the vehicle. In that case, ice will form on the evaporator coil inside and obstruct airflow.

In order for your RV’s AC system not to freeze over when temperatures dip below 32 degrees Fahrenheit, there must be adequate ventilation around all sides of where you are installing it. In this blog, we’ve laid out a few tips on how to keep RV air conditioner from freezing up.

You can also like – How to replace a ducted rv air conditioner.

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