Your Ford F-150 blower motor just stopped working, and you want to try fixing it yourself before you take it to a dealer? If this is you, you are in the right place.
In this post, you’ll learn how to fix a faulty blower motor in your Ford F-150.
Before we talk about the solutions for this issue, you should know why your blower motor isn’t working.
What Causes a Ford F-150 Blower Motor to Stop Working?
Several factors cause your Ford F-150 blower motor to stop working. Such problems include a bad relay, a blown fuse, and broken wires. Other issues, like a faulty blower motor resistor and a bad climate control unit, can also prevent the blower motor from working.
Keep reading for a detailed guide on how to fix your Ford F-150 blower motor.
How to Fix Ford F-150 Blower Motor Problems
Check Your Blower Motor Relay
A bad relay can prevent your blower motor from working.
The role of the relay is to switch your blower motor when you turn on your AC. But when the relay goes bad, it will lose its ability to turn on your blower motor. So, the blower motor will stay off while your AC is running.
You can fix this issue by replacing your blower motor relay. But first, confirm that the relay is faulty.
Here’s how to test your blower motor relay:
- Turn on your AC fan.
- Unplug the blower motor relay from its pin terminal.
- Search for another relay with the same amp rating as your blower motor relay. Then remove the other relay from its terminal.
- Now, insert your blower motor relay into the other relay’s terminal.
- If the relay doesn’t work in this terminal, it is faulty.
Once you’ve confirmed that your blower motor relay is faulty, you’ll need to change it. The blower motor relay in a Ford F-150 is usually located in the fuse box under the steering wheel. If you don’t find your relay there, search for it in your under-hood fuse box.
To identify your blower motor relay, study the wiring diagram in your owner’s manual. The manual will help you identify the relay. It will also indicate the exact location of the relay, so you have no issues finding it.
After changing your blower motor relay, check if the blower motor is working. If it isn’t working, try the next step.
Check for Blown Fuses in Your Car
Another reason your blower motor may not work is a blown fuse.
When a fuse is blown, the vehicle suffers a short circuit. As a result, the electronic devices in your car, which includes your blower motor, won’t receive an adequate power supply. Your blower motor can’t work if it doesn’t have enough power.
Search for your fuse boxes and check if you have any blown fuses. The fuse boxes in the Ford F-150 car are often located underneath your steering wheel and below your fuse boxes.
After finding the fuses, disconnect your negative battery cable. Then, pull out each fuse with a needle nose plier and inspect them against the light. Any fuse with a broken metal strip is blown.
Replace all the blown fuses you find in your car. Make sure to replace each bad fuse with a fuse of similar color and amperage.
If your blower motor fails to work after you’ve changed all the blown fuses, try the next tip.
Inspect Your Blower Motor Resistor
If your blower motor isn’t working, chances are your blower motor resistor is faulty.
The role of your blower motor resistor is to control the speed of the blower motor. The resistor decides how fast your blower motor should run based on the speed of your AC fan.
Over time, your blower motor resistor may become faulty. A faulty resistor may fail to collect data about your fan’s speed. As a result, the blower motor won’t blow air into your car.
You can check whether your blower motor resistor is bad by testing it with a multimeter. To run this test, connect the probes on the multimeter to your blower motor’s connector.
If the voltage count on the multimeter only shows volts at one fan speed, or it doesn’t detect any volts, your blower motor resistor is faulty.
Replacing your blower motor resistor will fix this issue.
You need 7mm and 8mm sockets, 8mm ratchets, and a trim removal tool to change your blower motor resistor.
Follow these steps to replace the blower motor resistor in Ford F-150:
- Locate your glove box.
- Use a 7mm socket to remove the bolts holding your glove box to the dashboard.
- Pull out your glove box.
- Remove the plastic clips on the panel below the glove box area with a trim removal tool.
- You’ll notice the blower motor resistor at the front of the heater box.
- Use your 8mm socket and ratchet to remove the mounting bolts on the resistor.
- Pull out your blower motor resistor. Then unplug the connector from the resistor to release it from your dashboard.
- Grab your new blower motor resistor.
- Connect the resistor to its connector.
- Insert the resistor into the heater box.
- Drive in the mounting bolts back onto the blower motor resistor.
- Re-install the panel below the glove box.
- Get your glove box and place it on the dashboard. Then screw in the bolts on the dashboard.
After replacing your blower motor, turn on the AC and check if your blower motor is working. If the blower motor refuses to work, move on to the next step.
Change the Connector on Your Blower Motor
Wiring problems can cause your blower motor to stop working.
Sometimes, rats sneak into your car and chew on the blower motor’s wires. Also, water may leak into your vehicle and spill over the wires, thus making them rust.
When your wires are damaged, they won’t be able to collect or deliver electrical currents to your blower motor. No blower motor can work without electricity.
Check your blower motor’s wires for bite marks or signs of rust. If you find these signs on your wires, the wires are broken.
To fix this issue, you’ll need to replace the connector on your blower motor.
The following guide will show you how to change the connector on your Ford F-150 blower motor:
- Use your 7mm socket to remove the screws at the bottom of the glove box. Then pull out the glove box and move it aside.
- Next, remove the plastic pins on the panel below your glove box.
- You can use a trim removal tool to release these clips.
- Once you’ve removed the panel, you’ll be able to see the blower motor.
- Your blower motor is located below the glove box.
- Press on the blower motor’s connector and pull it out.
- Now, use your pliers to cut the wires on the connector.
- Get your new connector.
- The next step is to splice the wires on the blower motor with the wires on the new connector.
- Use a wire stripper to remove some of the insulation on both wires.
- This will ensure that you have enough exposed wire.
- Place the connector’s wires on the blower motor’s wires and twist them together.
- Use a soldering iron to solder the joint.
- Now, re-install the panel at the bottom of the dashboard.
- Also, insert your glove box and drive the bolts into it.
Is the blower motor working now? If not, try the next tip.
Replace Your Blower Motor
Your blower motor might fail to work because it is dead.
If your blower motor is dead, you might hear strange noises from your dashboard. But this sign isn’t exclusive to a blower motor. Other AC components, like the blend door actuator, may also produce weird sounds in your dashboard when they go bad.
A more precise method for diagnosing a dead blower motor is to connect the blower motor to a 12-volt battery using an alligator test cable. If your blower motor doesn’t spin after you’ve linked it to the battery, the blower motor is bad.
You can also test your blower motor’s health with a multimeter. To do this, insert the probes on the multimeter into the gaps in the connector. If the multimeter detects 12 volts, the blower motor has most likely gone bad.
You can solve this problem by replacing the blower motor in your Ford F-150. The tools you need for this replacement are 7mm and 8mm sockets, an 8mm ratchet, and a trim tool.
Use the guide below when replacing the blower motor in your Ford F-150:
- Locate your glove box underneath the passenger-side dashboard.
- Remove the bolts at the bottom of the glove box with your 7mm socket. Then pull out your glove box.
- Next, detach the plastic pins on the panel below your glove box area.
- You can use your trim removal tool to remove these pins.
- Take out the panel.
- Find your blower motor underneath the glove box area.
- Unplug the connector on your blower motor.
- Use your 8mm socket and ratchet to remove the bolts on your blower motor.
- Pull out your blower motor carefully.
- Insert your new blower motor into the outlet.
- Re-install the mounting bolts onto the blower motor. Then attach the blower motor connector.
- Return your kick panel to the bottom of the dashboard.
- Re-insert the plastic clips on the panel.
- Now get your glove-box and install it on your dashboard.
Your blower motor should resume working after this. But if it doesn’t, continue to the next step.
Related: How to Fix GMC Envoy Blower Motor Issues.
Replace Your Climate Control Unit
A faulty climate control unit can prevent your blower motor from working. This is because the blower motor resistor relies on the climate control unit for information on your fan’s speed.
If your climate control unit is bad, it may indicate that the fan is off when it is still working. In response, the resistor will keep the blower motor off.
If you’ve tried all the tips above, yet your blower motor doesn’t work, your climate control unit might be faulty. As such, you’ll need to replace the unit.
I don’t recommend DIY for a climate control unit replacement. If you aren’t a car expert, you may damage some electrical connections in your vehicle while removing or replacing the unit.
If you need to replace your climate control unit, hire an auto mechanic to do it. You can read more about Ford F-150 climate control problems.
Study the steps required to apply each solution carefully, and follow them as we’ve instructed. If none of the tips here fixes your blower motor, contact your dealer.