How to Reset Sleeper Air

If you’re a truck driver or spend a lot of time on the road, you know how important it is to have a comfortable and functional sleeper. A big part of that is having a well-functioning sleeper air system. But sometimes, that system can malfunction or stop working altogether. When that happens, it’s important to know how to reset it to get it back up and running. In this article, we’ll walk you through the steps to reset your sleeper air system so you can get back to being comfortable on the road.

What is Sleeper Air?

Before we dive into how to reset your sleeper air system, it’s important to understand what it is and how it works. Sleeper air is a climate control system that provides cool or warm air to the sleeper compartment of a truck. It’s designed to keep the driver comfortable while they’re sleeping or resting in their truck. The sleeper air system is typically powered by the truck’s engine and controlled by a thermostat located in the sleeper compartment.

Signs of a Malfunctioning Sleeper Air System

If your sleeper air system isn’t working properly, there are a few signs to look out for. The most obvious sign is that the air coming out of the vents isn’t cold or warm, depending on the setting. You may also notice that the fan isn’t blowing as strong as it should be, or that there’s a strange smell coming from the vents. These are all signs that your sleeper air system may need to be reset.

Step-by-Step Guide to Resetting Your Sleeper Air System

Now that you know what sleeper air is and how to recognize when it’s not working properly, let’s dive into the steps to reset it.

Step 1: Turn Off the Truck

The first step to resetting your sleeper air system is to turn off the truck. This will ensure that there’s no power going to the system and that it’s completely off.

Step 2: Locate the Breaker Box

Next, you’ll need to locate the breaker box for the sleeper air system. This is typically located near the sleeper compartment, but the exact location may vary depending on the make and model of your truck. Once you’ve located the breaker box, open it up.

Step 3: Check the Breakers

Inside the breaker box, you’ll see a series of breakers. Look for the one labeled “sleeper air” or something similar. Check to see if the breaker is tripped. If it is, flip it off and then back on again. This should reset the system.

Step 4: Wait for the System to Reset

Once you’ve reset the breaker, give the system a few minutes to reset itself. You can use this time to check the thermostat in the sleeper com partment to make sure it’s set to the desired temperature.

Step 5: Turn On the Truck

After a few minutes, turn the truck back on and check the sleeper air system to make sure it’s working properly. You should feel cool or warm air coming out of the vents, depending on the setting.

Common Causes of Sleeper Air Malfunctions

Sleeper air systems are a vital part of a truck’s comfort system, providing much-needed cool air during long hauls. However, they can sometimes malfunction, leaving drivers feeling hot and uncomfortable on the road. In this section, we’ll explore some common causes of sleeper air malfunctions:

1.         Clogged Air Filters: One of the most common causes of sleeper air malfunctions is a clogged air filter. Over time, the filter can become clogged with dirt, dust, and debris, restricting airflow and reducing cooling capacity.

2.         Faulty Compressor: The compressor is responsible for pressurizing the refrigerant and pumping it through the system. If the compressor is faulty, it can lead to poor cooling performance or no cooling at all.

3.         Leaking Refrigerant: A refrigerant leak can occur due to a damaged hose or valve, causing the system to lose its cooling power. Leaks can also be dangerous, as refrigerant can be harmful to human health and the environment.

4.         Electrical Issues: Sleeper air systems are controlled by a series of electrical components, including relays, switches, and fuses. If any of these components fail or malfunction, it can cause the system to stop working.

5.         Frozen Evaporator: The evaporator is responsible for cooling the air before it enters the cab. If the evaporator becomes frozen due to low refrigerant levels or other issues, it can cause the system to stop working.


In conclusion, a functioning sleeper air system is essential for the comfort, health, and safety of truck drivers during long hauls. By understanding the common causes of malfunctions and the benefits of a properly functioning system, truckers can take steps to prevent and diagnose issues with their cooling systems. Regular maintenance and repair of sleeper air systems are critical to ensuring that drivers have a comfortable and safe working environment on the road. Truck drivers face many challenges on the road, including extreme temperatures, long hours, and fatigue.