Your Ford Expedition’s Rear AC Is Not Working? Here’s Why!

Do you own a Ford Expedition and are experiencing issues with the rear air conditioning You’re not alone. This is a common problem that can be frustrating and inconvenient. But don’t worry, there is a solution. In this guide, we will walk you through the steps to troubleshoot and repair the rear air conditioning in your Ford Expedition. We’ll also provide some tips to help prevent this issue from happening again in the future. So if you’re ready to get your rear air conditioning working again, let’s get started!

Reasons Why Ford Expedition Rear Ac Not Working

Here are the reasons:

Bad Thermostat

The thermostat controls the flow of coolant through the radiator and heater core. If the thermostat is stuck open, coolant will flow through the radiator and heater core all the time, even when the air conditioner is not running. This will cause the air conditioner to not work properly.

Low Refrigerant Level

Refrigerant is a key component of the air conditioning system. If the refrigerant level is too low, the air conditioner will not work properly.

Faulty Compressor

The compressor is the heart of the air conditioning system. It is responsible for compressing the refrigerant and sending it through the evaporator. If the compressor is faulty, the air conditioner will not work properly.

Faulty Expansion Valve

The expansion valve controls the flow of refrigerant through the evaporator. If the expansion valve is faulty, the air conditioner will not work properly.

Faulty Evaporator

The evaporator is responsible for cooling the air that is blown into the cabin. If the evaporator is faulty, the air conditioner will not work properly.

How to Troubleshoot: Ford Expedition Rear AC Not Working

The rear air conditioner in your Ford Expedition can help keep you cool and comfortable on hot days, but what happens when it stops working? There are a few common causes for a rear AC not working, and troubleshooting the issue can be relatively simple. In this guide, we’ll walk you through the steps to diagnose and fix a rear AC problem in your Ford Expedition.

Tools and Materials

You will need the following tools and materials to troubleshoot the rear AC in your Ford Expedition:

A voltmeter
A pressure gauge
A set of metric wrenches
A can of compressed air
A shop vac
A cleaning solution

Step 1: Identify the Problem

The first step to troubleshooting any problem is to identify the problem. In the case of a rear AC not working, there are a few things you can check to narrow down the issue:

Is the AC compressor running? You can check this by listening for the compressor cycling on and off. If the compressor is not running, then the problem is likely with the compressor itself or the electrical system that powers it.

Is the AC blowing cold air? If the AC is blowing cold air, then the problem is likely with the blend door or the evaporator core.

Is there any condensation on the evaporator core? If there is no condensation on the evaporator core, then the problem is likely with the refrigerant system.

Once you have identified the problem, you can begin troubleshooting the specific component that is causing the issue.

Step 2: Troubleshooting the Compressor

If the compressor is not running, then the first thing you will need to do is check the electrical system that powers it. To do this, you will need to locate the compressor clutch relay and the compressor wiring harness.

Locating the Compressor Clutch Relay

The compressor clutch relay is typically located in the engine compartment, near the fuse box. It is a small, black box with a red button on top.

Checking the Compressor Wiring Harness

The compressor wiring harness is a black, plastic connector that connects the compressor to the electrical system. It is typically located on the back of the compressor.

To check the electrical system, you will need to use a voltmeter to check the voltage at the compressor clutch relay and the compressor wiring harness. If there is no voltage at either of these locations, then the problem is likely with the electrical system.

Troubleshooting the Compressor

If there is voltage at the compressor clutch relay and the compressor wiring harness, then the problem is likely with the compressor itself. To test the compressor, you will need to use a pressure gauge to check the pressure in the refrigerant system.

Checking the Refrigerant Pressure

The refrigerant pressure should be between 25 and 35 psi when the AC is turned on. If the pressure is too low, then the compressor may be damaged. If the pressure is too high, then the compressor may be overloaded.

If the compressor is damaged, it will need to be replaced. If the compressor is overloaded, then you will need to find and fix the problem that is causing the overload.

Step 3: Troubleshooting the Blend Door

If the AC is blowing cold air, but it is not coming out of the rear vents, then the problem is likely with the blend door. The blend door is a flap that controls the flow of air to the front and rear vents. To check the blend door, you will need to remove the glove box and access the blend door actuator.

Locating the Blend Door Actuator

The blend door actuator is a small, black motor that is located behind the glove box. It is connected to the blend door by a linkage.

Checking the Blend Door Actuator

To check the blend door actuator, you will need to use a voltmeter to check the voltage at the actuator. If there is no voltage at the actuator, then the problem is likely with the actuator itself or the electrical system. If there is voltage at the actuator, then the problem is likely with the blend door.

Troubleshooting the Blend Door

If the blend door actuator is not working, it will need to be replaced. If the blend door is damaged, it will need to be replaced.

Step 4: Troubleshooting the Evaporator Core

If there is no condensation on the evaporator core, then the problem is likely with the refrigerant system. To check the refrigerant

Also Read: Ford Expedition Rear Passenger Door Won’T Open From Outside

FAQs: Ford Expedition Rear AC Not Working

Why is my Ford Expedition rear AC not working?

There are a few possible reasons why your Ford Expedition rear AC may not be working.

The air conditioner may be low on refrigerant: This is the most common cause of a malfunctioning rear AC. Refrigerant is a gas that helps to cool the air inside the cabin. If the air conditioner is low on refrigerant, it will not be able to cool the air effectively.

The air conditioner compressor may be broken: The compressor is the part of the air conditioner that actually does the work of compressing the refrigerant and making it cold. If the compressor is broken, the air conditioner will not be able to cool the air at all.

The condenser may be clogged: The condenser is the part of the air conditioner that condenses the refrigerant back into a liquid. If the condenser is clogged, the refrigerant will not be able to circulate properly and the air conditioner will not be able to cool the air.

The evaporator may be dirty: The evaporator is the part of the air conditioner that absorbs the heat from the air inside the cabin. If the evaporator is dirty, it will not be able to absorb heat effectively and the air conditioner will not be able to cool the air.

The blower motor may be broken: The blower motor is the part of the air conditioner that blows the air through the vents. If the blower motor is broken, the air conditioner will not be able to circulate the cool air throughout the cabin.

How do I fix my Ford Expedition rear AC?

The first step is to determine what is causing the problem. Once you have determined the cause, you can then take the appropriate steps to fix it.

If the air conditioner is low on refrigerant, you can add more refrigerant to the system: You can do this yourself, or you can take your vehicle to a qualified auto repair shop.

If the air conditioner compressor is broken, you will need to replace it: This is a job that is best left to a qualified auto repair shop.

If the condenser is clogged, you can clean it out: You can do this yourself, or you can take your vehicle to a qualified auto repair shop.

If the evaporator is dirty, you can clean it out: You can do this yourself, or you can take your vehicle to a qualified auto repair shop.

If the blower motor is broken, you will need to replace it: This is a job that is best left to a qualified auto repair shop.

How much does it cost to fix a Ford Expedition rear AC?

The cost of fixing a Ford Expedition rear AC will vary depending on the cause of the problem. The cost of adding refrigerant to the system will typically range from $50 to $100. The cost of replacing the air conditioner compressor will typically range from $500 to $1,000. The cost of cleaning the condenser or evaporator will typically range from $100 to $200. The cost of replacing the blower motor will typically range from $100 to $200.

What can I do to prevent my Ford Expedition rear AC from breaking down?

There are a few things you can do to help prevent your Ford Expedition rear AC from breaking down.

Keep the air conditioner clean: Make sure to clean the air filter regularly and to clean the condenser and evaporator coils every few years.

Don’t overload the air conditioner: Don’t try to cool down the entire house with your air conditioner. Only cool the rooms that you are using.

Don’t let the air conditioner run all the time: Turn the air conditioner off when you are not home or when you are not using it.

Have your air conditioner serviced regularly: Have your air conditioner serviced once a year to make sure that it is working properly.

By following these tips, you can help to prevent your Ford Expedition rear AC from breaking down.

What are the symptoms of a bad Ford Expedition rear AC?

There are a few symptoms that can indicate that your Ford Expedition rear AC is bad.

The air conditioner is not blowing cold air: This is the most obvious symptom of a bad rear AC.

The air conditioner is blowing warm air: This can be caused by a number of problems, including a low refrigerant charge, a broken compressor, or a clogged condenser or evaporator.

The air conditioner is making strange noises: