2003 Ford Expedition Rear Heater Not Working [Quick And Easy Solutions]

The 2003 Ford Expedition is a popular SUV that is known for its comfort and performance. However, one common problem that can occur with these vehicles is a malfunctioning rear heater. This can be a major inconvenience, especially during the winter months. In this guide, we will walk you through the steps to troubleshoot and repair a 2003 Ford Expedition rear heater that is not working.

Symptoms of a Malfunctioning Rear Heater

There are a few different symptoms that can indicate that the rear heater on your 2003 Ford Expedition is not working properly. These include

No heat coming out of the rear vents
The rear vents blowing cold air
The rear heater turning on and off by itself
The rear heater making strange noises

If you are experiencing any of these symptoms, it is important to have the rear heater checked out by a qualified mechanic as soon as possible.

Why 2003 Ford Expedition Rear Heater Not Working

Bad blower motor

The blower motor is responsible for circulating air through the cabin. If the blower motor is not working, the rear heater will not work.

Bad blower motor resistor

The blower motor resistor controls the speed of the blower motor. If the blower motor resistor is bad, the blower motor may not work at all or it may only work on high speed.

Bad blend door actuator

The blend door actuator controls the position of the blend door, which directs air to the front or rear vents. If the blend door actuator is bad, the rear heater may not work.

Bad climate control module

The climate control module controls the temperature and airflow of the HVAC system. If the climate control module is bad, the rear heater may not work.

How to Troubleshoot: 2003 Ford Expedition Rear Heater Not Working

The rear heater in a 2003 Ford Expedition is a vital part of keeping passengers warm during cold weather. If the rear heater is not working, it can be a major inconvenience. There are a few things that you can check to troubleshoot the problem.

Possible Causes

There are a few different things that could cause the rear heater in a 2003 Ford Expedition to stop working. Some of the most common causes include:

A blown fuse
A faulty blower motor
A bad blend door actuator
A clogged air filter
A faulty thermostat

Troubleshooting Steps

To troubleshoot the problem with the rear heater in your 2003 Ford Expedition, you will need to follow these steps:

1. Check the fuses. The first thing you should do is check the fuses for the rear heater. The fuses are located in the under-hood fuse box. There are two fuses that you need to check: the rear heater fuse and the blower motor fuse.
2. Test the blower motor. If the fuses are good, the next thing you need to do is test the blower motor. You can do this by turning on the rear heater and listening for the blower motor to come on. If you don’t hear the blower motor, it is likely faulty and will need to be replaced.
3. Check the blend door actuator. The blend door actuator is responsible for directing the air from the heater core to the rear vents. If the blend door actuator is faulty, it can prevent the air from reaching the rear vents. You can test the blend door actuator by using a voltmeter.
4. Clean the air filter. The air filter can become clogged over time, which can restrict airflow and prevent the rear heater from working properly. You can clean the air filter by removing it from the housing and blowing it out with compressed air.
5. Check the thermostat. The thermostat is responsible for regulating the temperature of the coolant in the engine. If the thermostat is stuck open, it can prevent the coolant from reaching the heater core. You can test the thermostat by removing it from the engine and immersing it in a pot of boiling water. If the thermostat opens, it is good. If it does not open, it is bad and will need to be replaced.

Conclusion

If you have followed these troubleshooting steps and the rear heater in your 2003 Ford Expedition is still not working, you will need to take it to a qualified mechanic for further diagnosis and repair.

Also Read: 2003 Ford Expedition Won T Start

FAQs: 2003 Ford Expedition Rear Heater Not Working

Why is my 2003 Ford Expedition rear heater not working?

There are a few possible reasons why your 2003 Ford Expedition rear heater may not be working. Here are some of the most common causes:

The blower motor is not working: The blower motor is responsible for circulating air through the heater core, which warms the air and blows it into the cabin. If the blower motor is not working, the air will not be heated and the rear heater will not work.

The heater core is clogged: The heater core is a small radiator that is located in the passenger compartment. It is responsible for heating the air that is blown into the cabin. If the heater core is clogged, the air will not be able to flow through it and the rear heater will not work.

The blend door actuator is not working: The blend door actuator is a small motor that is responsible for controlling the position of the blend door. The blend door directs air from the heater core to the front or rear vents. If the blend door actuator is not working, the air will not be able to flow to the rear vents and the rear heater will not work.

The wiring to the rear heater is damaged: The rear heater is connected to the car’s electrical system by a series of wires. If any of these wires are damaged, the rear heater will not be able to receive power and it will not work.

How can I fix my 2003 Ford Expedition rear heater?

The first step is to determine what is causing the rear heater to not work. Once you have identified the cause, you can take steps to fix it. Here are some possible solutions:

If the blower motor is not working, you can replace it: The blower motor is a relatively easy part to replace and you can do it yourself with a few tools.

If the heater core is clogged, you can have it cleaned or replaced: Cleaning the heater core is a fairly simple process, but replacing it can be more difficult. If you are not comfortable doing this yourself, you can take your car to a mechanic.

If the blend door actuator is not working, you can replace it: The blend door actuator is a small motor, so it is a relatively easy part to replace. You can do it yourself with a few tools.

If the wiring to the rear heater is damaged, you can repair or replace it: Repairing or replacing the wiring to the rear heater can be more difficult than replacing the other parts, but it is still possible to do it yourself.

How much does it cost to fix a 2003 Ford Expedition rear heater?

The cost of fixing a 2003 Ford Expedition rear heater will vary depending on the cause of the problem. If the blower motor is not working, you can expect to pay around $50 to $100 for a replacement. If the heater core is clogged, you can expect to pay around $100 to $200 for cleaning or replacement. If the blend door actuator is not working, you can expect to pay around $50 to $100 for a replacement. If the wiring to the rear heater is damaged, you can expect to pay around $50 to $100 for repairs or replacement.

Can I drive my 2003 Ford Expedition without a rear heater?

Yes, you can drive your 2003 Ford Expedition without a rear heater. However, you may experience some discomfort if it is cold outside. The front heater will still work, so you can use that to warm up the cabin.

Is there anything else I can do to improve the heating in my 2003 Ford Expedition?

There are a few things you can do to improve the heating in your 2003 Ford Expedition:

Make sure the cabin air filter is clean: A dirty cabin air filter can restrict airflow and make the cabin feel colder.

Close the windows and doors: Air leaks can also reduce airflow and make the cabin feel colder.

Turn off the air conditioner: The air conditioner can actually make the cabin feel colder by removing heat from the air.

Use the defrost setting: The defrost setting will direct warm air to the windshield, which can help to improve visibility in cold weather.