why is my Ford Explorer Fifth Generation (2011-2019) blower motor only working on high?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

497 words

Problem Statement

Learn how to diagnose and fix the blower motor issue in Ford Explorer (2011-2019) that only works on high. Step-by-step guide with diagnostic procedures.

Affected Component

HVAC

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shocks or shorts

Symptoms

•Blower motor operates only on high speed
•No response from blower motor on low and medium speed settings
•Possible increase in cabin noise when blower is on high
•No change in airflow direction settings (if applicable)
•No dashboard warning lights related to HVAC system

Diagnostic Steps

1
Inspect the blower motor switch for any signs of damage or wear
2
Use an OBD-II scanner to check for any associated fault codes related to the HVAC system
3
Locate and inspect the blower motor resistor for physical damage or burnt components
4
Test the blower motor resistor for proper resistance values using a multimeter
5
Check the wiring harness and connectors for loose connections or corrosion
6
Verify the operation of the climate control module if equipped

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Socket set
•Screwdrivers

Parts Required

•Blower motor resistor (if faulty)

Related Faults

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Diagnostic Steps

1
Inspect the blower motor switch for any signs of damage or wear
2
Use an OBD-II scanner to check for any associated fault codes related to the HVAC system
3
Locate and inspect the blower motor resistor for physical damage or burnt components
4
Test the blower motor resistor for proper resistance values using a multimeter
5
Check the wiring harness and connectors for loose connections or corrosion
6
Verify the operation of the climate control module if equipped

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, socket set, and screwdrivers.
Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Remove the Blower Motor Resistor

Locate the blower motor resistor, typically found near the blower motor under the dashboard on the passenger side.
Remove any necessary panels or covers to access the resistor.
Disconnect the electrical connector from the resistor.
Remove the mounting screws using a socket set and carefully pull the resistor out.

3. Inspect and Test the Resistor

Visually inspect the resistor for any burnt areas or physical damage.
Using a multimeter, set it to the resistance setting and check the resistor values according to the service manual specifications.
If the readings are outside the acceptable range, replace the resistor.

4. Install New Resistor

Position the new blower motor resistor in place.
Secure it with the mounting screws and reconnect the electrical connector.
Reinstall any panels or covers that were removed.

5. Test the Blower Motor Functionality

Reconnect the vehicle battery.
Start the vehicle and test the blower motor at all speed settings (low, medium, and high) to ensure proper operation.