Where Is The Fuse In A Freightliner Cascadia AC Compressor?

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Are you having trouble finding the fuse in your Freightliner Cascadia? Well, don't worry! We researched the answer for you.

The fuse in a Freightliner Cascadia's AC compressor is right behind the glove box. Simply follow the steps below to access the fuse:

  1. Clear the objects on the glove box.
  2. Unscrew the four corners.
  3. Pull the glove box out. There's a paper sticker that tells you what kind of fuse the unit has. 
  4. Find the velcro tape on the glove box, then pull it off.
  5. Now, remove the panel light. The fuse is connected to the wires and is measured as small as a thumb.

In this article, we'll discuss the importance of a fuse in a Freightliner Cascadia, and how could you check its condition. You'll understand how it functions and what the signs are to replace it. Let's continue reading!

Where Is The Fuse In A Freightliner Cascadia AC Compressor?

Freightliner Cascadia Truck logo

The main purpose of the fuse on a car's compressor is to protect the condenser from being overexposed to amperage or flow of electricity. Without the fuse, the power supply will continue to transmit electrical energy through the air conditioning system as long as the unit is turned on.

On a Freightliner Cascadia, you can find the fuse of its AC compressor in the glove box, or the small compartment on the front panel of the car. You just need to unscrew it to access the fuse.

There's also a fuse at the car's back hood, but that's for the tail light. This fuse is usually on the driver's side of the car.

How to Tell the AC Compressor Fuse Needs Replacement?

Cascadia tractor truck of the Freightliner line at its automotive plant located in Derramadero, Where Is The Fuse In A Freightliner Cascadia AC Compressor?

It's important to understand when the car's AC compressor needs a new fuse. So, familiarize yourself below with some signs of a blown fuse.

Inability to Cool Down Temperature

The compressor not turning on is an obvious sign that the AC relay is malfunctioning. When the air conditioner is turned on, you should also hear the compressor switch turn on. Otherwise, if you don't hear the clutch engage when you turn it on, it could be due to a faulty relay.

Turning on the AC in a hot car

Damaged Field Coil

A field coil is a component that generates a rotating field, producing 3-4 amps of current. However, if the field coil is damaged, it can carry up to 10 amps of current.

When this surge of current occurs, the fuse in your air conditioner is likely to blow. This usually happens after a long drive or when the air conditioner is turned on and off several times in a single trip.

Faulty Wires

A large amount of current will flow through the circuit if the wires do not provide enough resistance. Alternatively, due to a lack of insulation, the copper wires may come into contact with each other, resulting in a short circuit.

Wire repair can be difficult. If you are unfamiliar with it, it can also be dangerous. Consider hiring a mechanic to inspect the wiring in your vehicle's air conditioning system.

Broken AC Pressure Switch

Your car air conditioner should regulate pressure to constantly switch the state of the refrigerant from liquid to gas. If your pressure switch fails, the pressure will go high, resulting to a malfunction in the compressor motor. When this happens, the AC there may blow.

How to Replace the Fuse in a Freightliner Cascadia AC Compressor 

It's best to consult the manufacturer before replacing the fuse. The manufacturer can guide you on the proper procedure and help you to find a suitable fuse for replacement.

You can use a multimeter to test the fuse.

See this multimeter on Amazon.

However, should you need to do it yourself, you can follow the steps below:

  1. Unscrew the front panel to remove the glove box 
  2. Prepare the flashlight and a multimeter. Refer to the product's guide of use to turn on the multimeter.
  3. Point the multimeter on both ends of the fuse. If it flashes on both sides, then the fuse is working. Otherwise, you might need to replace it.
  4. To identify what kind of fuse to buy, simply read the description and the diagram on the glove box.
  5. Before replacing the fuse, ensure that the car engine is turned off.
  6. Pull the faulty fuse out using pliers.
  7. Dispose of the old fuse properly in a trash bin.
  8. Attach the new fuse according to the correct placement.
  9. Turn on the engine to test that the fuse is successfully installed.
  10. Cover and screw the glove box.

See a videos here for reference:

Why the AC Compressor Doesn't Work?

Driver hand tuning air ventilation grille

In case the AC compressor doesn't work despite that the fuse is still good, then there might be a problem somewhere in the air conditioning system. Check below some possible reasons.

Clogged Filter

The AC filter is probably too dirty, preventing the air to flow freely. You'll want to clean the filter more often so that you'll not inhale the dirt.

Follow the steps below:

  1. Press the recirculation button on the left side of the panel.
  2. Open the filter cabin by pushing its bottom part 
  3. Take the cover out to see the filter inside.
  4. Remove the filter. It's like foam and usually white.
  5. Wash the filter in a basin of water and soap. You can also replace it with a new one.
  6. Let the filter get dry before putting it back in place.
  7. Close the filter cabin and turn on the AC.

Watch a video here for your visual:

Overusing the AC

It's important to put the AC and other car components to rest when not in use. Doing so will save energy and keep the system in good condition.

However, modern vehicles don't require turning off the AC when the engine is on. The AC automatically turns off when you turn off the car itself and stop driving. In this case, you'll want to give hours to put the car to rest before using it again.

How to Refill the Refrigerant on Freightliner Cascadia

Check the pressure and leak. for use on air condition systems

The air conditioning system will not work if there's not enough refrigerant. Refrigerant is a substance that's responsible for cooling down the air temperature. Insufficient refrigerant can even cause damage to the unit.

See below the steps on how to refill the refrigerant on Freightliner Cascadia:

  1. Prepare a can of refrigerant R-34 or depending on what's recommended by the car manufacturer.
  2. Ensure that the Freightliner is turned on.
  3. Open the front hood and find the small box on the upper left side.
  4. Plug in the refrigerant on top.
  5. Press the handle button on the refrigerant.
  6. See the little gauge on the refrigerant to check if it's full.
  7. Pull the refrigerant out, then close the front hood.
  8. Check and test the air conditioning system if the temperature is cooling down.

You can watch a video here for a demonstration:

How Much Is Car AC Recharge?

Accumulator charging. Hands and terminals. Car repair

A professional service to refill the refrigerant in your car's AC system can cost you $150 to $300, depending on the car model. You'll want to seek guidance from the manufacturer to prevent causing damage to your AC system, add well as to the car's engine.

Freightliner Cascadia Warranty

You get to enjoy 1-2 years of warranty depending on the type of Freightliner Cascadia you have. The coverage of the warranty includes basic car parts and factory defects. However, the coverage might vary depending on your agreement with the manufacturer.

You'll want to read the warranty in the manual before repairing or changing any car parts. This will help you retain entitlement to the warranty as long as it's still valid.

What Is Freightliner Roadside Assistance?

It's a service from Freightliner to support their customers who need assistance on the road. The assistance includes guidance in changing tires, towing services, fuel concerns, and other services.

You can reach out to this service via call, and an authorized personnel will attend to your concern. However, charges may apply depending on what you need. 


Cascadia tractor truck of the Freightliner line at its automotive plant located in Derramadero

It's such another useful article, isn't it? We learned where to find the fuse on the AC compressor in Freightliner Cascadia. We also talked about replacing the fuse and other important matters, such as troubleshooting the AC and warranty details.

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