2003 Ford Expedition Ac Compressor Not Working [Causes & Proven Solutions]

Do you own a 2003 Ford Expedition and your AC compressor isn’t working You’re not alone. This is a common problem with this model of vehicle. But don’t worry, there is a fix! In this troubleshooting guide, I’ll walk you through the steps to diagnose and repair the problem. So you can get your AC back up and running in no time.

Why 2003 Ford Expedition Ac Compressor Not Working

Low Refrigerant Level

The most common cause of a non-working AC compressor is a low refrigerant level. This can be caused by a leak in the system, a faulty expansion valve, or a problem with the condenser. To check the refrigerant level, you will need to use a manifold gauge set. If the level is low, you will need to add refrigerant to the system.

Faulty Compressor Clutch

The compressor clutch is responsible for engaging and disengaging the compressor. If the clutch is faulty, it will not be able to engage the compressor, and the AC will not work. To test the compressor clutch, you will need to use a voltmeter. If the voltmeter shows no voltage at the clutch when the AC is turned on, the clutch is faulty and will need to be replaced.

Faulty Control Module

The control module is responsible for sending signals to the compressor clutch. If the control module is faulty, it will not be able to send the correct signals to the clutch, and the AC will not work. To test the control module, you will need to use a scan tool. If the scan tool shows that the control module is not sending the correct signals, the control module will need to be replaced.

Other Possible Causes

Other possible causes of a non-working AC compressor include a faulty condenser fan, a faulty evaporator fan, or a problem with the wiring. To diagnose these problems, you will need to use a voltmeter and a test light.

How to Troubleshoot: 2003 Ford Expedition AC Compressor Not Working

The air conditioner (AC) compressor in your 2003 Ford Expedition is responsible for circulating refrigerant gas through the system to cool the air inside the cabin. If the AC compressor is not working, the air conditioner will not blow cold air. There are a few things that could cause the AC compressor to stop working, including a blown fuse, a faulty compressor clutch, or a low refrigerant charge.

Diagnosing the Problem

The first step in troubleshooting the problem is to check the AC fuse. The fuse is located in the under-hood fuse box. If the fuse is blown, replace it with a new fuse of the same amperage.

Once you have checked the fuse, you will need to test the compressor clutch. The compressor clutch is located on the front of the AC compressor. To test the compressor clutch, you will need a multimeter.

To test the compressor clutch, follow these steps:

1. Turn off the engine and allow the vehicle to cool down.
2. Disconnect the negative battery cable.
3. Locate the compressor clutch. It is a small, round device that is attached to the front of the AC compressor.
4. Connect the red lead of the multimeter to the positive terminal of the compressor clutch.
5. Connect the black lead of the multimeter to the ground.
6. Turn on the multimeter and set it to the AC voltage setting.
7. Start the engine and let it idle for a few minutes.
8. The compressor clutch should engage and the multimeter should show a reading of approximately 12 volts.
9. If the compressor clutch does not engage or the multimeter does not show a reading of approximately 12 volts, the compressor clutch is faulty and will need to be replaced.

If the compressor clutch is good, the next step is to check the refrigerant charge. The refrigerant charge is the amount of refrigerant gas that is in the AC system. If the refrigerant charge is too low, the AC compressor will not be able to build up enough pressure to cool the air.

To check the refrigerant charge, you will need a refrigerant manifold gauge set.

To check the refrigerant charge, follow these steps:

1. Turn off the engine and allow the vehicle to cool down.
2. Disconnect the negative battery cable.
3. Locate the low-pressure and high-pressure service ports on the AC compressor.
4. Connect the low-pressure and high-pressure hoses from the manifold gauge set to the service ports on the AC compressor.
5. Turn on the engine and let it idle for a few minutes.
6. The low-pressure gauge should show a reading of approximately 30-40 psi.
7. The high-pressure gauge should show a reading of approximately 150-200 psi.
8. If the low-pressure gauge shows a reading of less than 30 psi or the high-pressure gauge shows a reading of more than 200 psi, the refrigerant charge is too low and will need to be topped off.

If the refrigerant charge is good, the next step is to check the AC system for leaks. A leak in the AC system will cause the refrigerant to escape and the AC compressor to not be able to build up enough pressure to cool the air.

To check the AC system for leaks, you will need a can of refrigerant leak detector.

To check the AC system for leaks, follow these steps:

1. Turn off the engine and allow the vehicle to cool down.
2. Disconnect the negative battery cable.
3. Locate the AC evaporator core. It is located in the passenger compartment, under the dashboard.
4. Spray the refrigerant leak detector around the AC evaporator core.
5. If the refrigerant leak detector turns blue, there is a leak in the AC system.

If you find a leak in the AC system, you will need to have the leak repaired before the AC compressor can be replaced.

Replacing the AC Compressor

Replacing the AC compressor is a relatively straightforward task, but it does require some special tools and skills. If you are not comfortable working on your own vehicle, you should have the AC compressor replaced by a qualified mechanic.

To replace the AC compressor, you will need the following tools and materials:

A set of metric wrenches
A set of pliers
A refrigerant manifold gauge set
A can of refrigerant leak detector
A new AC compressor
A new AC compressor clutch
A new AC condenser
A new AC receiver dryer
A new AC expansion valve

Also Read: 2003 Ford Expedition Ac Not Working

FAQs: 2003 Ford Expedition AC Compressor Not Working

What could be causing my 2003 Ford Expedition AC compressor not to work?

There are a few possible causes for a 2003 Ford Expedition AC compressor not to work. These include:

A faulty compressor clutch
A low refrigerant charge
A bad condenser
A bad expansion valve
A bad evaporator

How can I tell if my 2003 Ford Expedition AC compressor clutch is bad?

There are a few ways to tell if the compressor clutch on your 2003 Ford Expedition is bad. These include:

The AC compressor will not engage when you turn on the AC
The AC compressor will engage and then disengage shortly after
The AC compressor will make a whining or grinding noise
The AC compressor will not build pressure

How can I add refrigerant to my 2003 Ford Expedition AC system?

Adding refrigerant to your 2003 Ford Expedition AC system is a relatively simple process. However, it is important to do it correctly to avoid damaging your AC system. Here are the steps involved:

1. Locate the low-pressure service port on your AC system. This is usually located on the evaporator core.
2. Attach a manifold gauge set to the low-pressure service port.
3. Turn on the AC and set the temperature to the coldest setting.
4. Open the high-pressure service port on your AC system.
5. Allow refrigerant to flow into the system until the pressure reaches the specified level.
6. Close the high-pressure service port.
7. Turn off the AC.
8. Disconnect the manifold gauge set.

How can I tell if my 2003 Ford Expedition condenser is bad?

There are a few ways to tell if the condenser on your 2003 Ford Expedition is bad. These include:

The AC will not blow cold air
The AC will blow hot air
The AC will not build pressure
The AC will make a rattling or hissing noise

How can I tell if my 2003 Ford Expedition expansion valve is bad?

There are a few ways to tell if the expansion valve on your 2003 Ford Expedition is bad. These include:

The AC will not blow cold air
The AC will blow hot air
The AC will not build pressure
The AC will make a rattling or hissing noise

How can I tell if my 2003 Ford Expedition evaporator is bad?

There are a few ways to tell if the evaporator on your 2003 Ford Expedition is bad. These include:

The AC will not blow cold air
The AC will blow hot air
The AC will not build pressure
The AC will make a rattling or hissing noise