Ford Expedition Rear Heat Not Working [Causes & Proven Fixes]

Do you own a Ford Expedition and are experiencing problems with the rear heat not working You are not alone. This is a common issue that can be frustrating and inconvenient, especially during the winter months. In this troubleshooting guide, I will walk you through the steps to diagnose and fix the problem. I will also provide some tips on how to prevent it from happening again. So if you’re ready to get your rear heat back up and running, let’s get started!

Why Ford Expedition Rear Heat Not Working

Bad blower motor resistor

The blower motor resistor is a small electronic component that controls the speed of the blower motor. If the resistor is bad, it can cause the rear heat to stop working. To test the resistor, you can use a multimeter to measure the resistance between the terminals. If the resistance is infinite, the resistor is bad and needs to be replaced.

Bad blower motor

The blower motor is responsible for blowing air through the vents. If the blower motor is bad, it can cause the rear heat to stop working. To test the blower motor, you can use a multimeter to measure the voltage at the motor terminals. If there is no voltage, the motor is bad and needs to be replaced.

Blocked air ducts

The air ducts can become blocked with dirt, dust, or debris. This can prevent air from flowing through the ducts and reaching the rear vents. To clean the air ducts, you can use a vacuum cleaner or a compressed air canister.

Faulty blend door actuator

The blend door actuator is a small motor that controls the position of the blend door. The blend door determines how much hot and cold air is mixed together. If the blend door actuator is bad, it can cause the rear heat to stop working. To test the blend door actuator, you can use a multimeter to measure the voltage at the actuator terminals. If there is no voltage, the actuator is bad and needs to be replaced.

How to Troubleshoot: Ford Expedition Rear Heat Not Working

The rear heat in your Ford Expedition is a great way to stay warm on those cold winter days. However, if the rear heat isn’t working, it can be a real pain. There are a few things that could be causing the problem, and in this article, we’ll walk you through how to troubleshoot the issue.

Possible Causes

There are a few different things that could be causing the rear heat in your Ford Expedition to not work. Here are some of the most common causes:

A blown fuse:

The first thing you should check is the fuse for the rear heat. This fuse is usually located in the under-hood fuse box. To check the fuse, simply remove it from the fuse box and inspect it for damage. If the fuse is blown, replace it with a new one.

A faulty blower motor:

The blower motor is responsible for blowing air through the vents. If the blower motor is faulty, it won’t be able to circulate air through the vents, which will prevent the rear heat from working. To check the blower motor, you can listen for it running when you turn on the rear heat. If you don’t hear the blower motor running, it’s likely faulty and will need to be replaced.

A clogged cabin air filter:

The cabin air filter helps to keep dirt and debris out of the air that’s being circulated through the vents. If the cabin air filter is clogged, it can restrict airflow, which will prevent the rear heat from working properly. To check the cabin air filter, you can remove it from the housing and inspect it for dirt and debris. If the filter is clogged, replace it with a new one.

A faulty blend door actuator:

The blend door actuator is responsible for controlling the airflow between the front and rear vents. If the blend door actuator is faulty, it won’t be able to properly direct airflow to the rear vents, which will prevent the rear heat from working. To check the blend door actuator, you can use a diagnostic tool to scan for codes. If there are any codes related to the blend door actuator, it’s likely faulty and will need to be replaced.

Troubleshooting Steps

Once you’ve identified the possible cause of the problem, you can follow these steps to troubleshoot the issue:

1. Check the fuse:

The first thing you should do is check the fuse for the rear heat. This fuse is usually located in the under-hood fuse box. To check the fuse, simply remove it from the fuse box and inspect it for damage. If the fuse is blown, replace it with a new one.

2. Listen for the blower motor:

The next thing you should do is listen for the blower motor running when you turn on the rear heat. If you don’t hear the blower motor running, it’s likely faulty and will need to be replaced.3. Check the cabin air filter:

The next thing you should do is check the cabin air filter. The cabin air filter helps to keep dirt and debris out of the air that’s being circulated through the vents. If the cabin air filter is clogged, it can restrict airflow, which will prevent the rear heat from working properly. To check the cabin air filter, you can remove it from the housing and inspect it for dirt and debris. If the filter is clogged, replace it with a new one.

4. Use a diagnostic tool:

If you’re still having trouble troubleshooting the issue, you can use a diagnostic tool to scan for codes. If there are any codes related to the blend door actuator, it’s likely faulty and will need to be replaced.

Conclusion

If you’ve followed these steps and you’re still having trouble troubleshooting the issue, it’s best to take your Ford Expedition to a qualified mechanic. They will be able to diagnose the problem and make the necessary repairs.

Also Read: Rear Ac Not Working Ford Expedition

Frequently Asked Questions about Ford Expedition Rear Heat Not Working

1. Why is the rear heat in my Ford Expedition not working?

There could be several reasons for the rear heat not working in your Ford Expedition
including a malfunctioning rear heater core
a faulty blower motor
a problem with the heater control valve
or issues with the electrical system. It’s best to have a professional diagnose the specific cause of the problem.

2. How can I troubleshoot the rear heat issue in my Ford Expedition?

You can start troubleshooting the rear heat issue in your Ford Expedition by checking the coolant levels
inspecting the rear heater core for clogs or leaks
testing the rear blower motor
and ensuring that the heater control valve is functioning properly. If you’re unable to identify the issue
it’s recommended to seek assistance from a qualified mechanic.

3. Can a clogged cabin air filter cause the rear heat to stop working in a Ford Expedition?

Yes
a clogged cabin air filter can restrict airflow to the rear heating system
leading to reduced or no heat output. Regularly replacing the cabin air filter as part of routine maintenance can help prevent this issue.

4. What are common signs of a failing rear heater core in a Ford Expedition?

Common signs of a failing rear heater core in a Ford Expedition include insufficient or no heat from the rear vents
a sweet smell inside the vehicle
dampness or moisture in the rear cabin area
and visible coolant leaks. If you notice any of these symptoms
it’s important to have the heater core inspected and repaired if necessary.

5. Is it safe to continue driving my Ford Expedition if the rear heat is not working?

While it may be safe to drive your Ford Expedition with a non-functioning rear heat system
it can be uncomfortable for passengers
especially in cold weather. Additionally
if the issue is related to the vehicle’s cooling system
it’s important to address it promptly to prevent potential overheating or other complications.