how to fix the rear AC in my Ford Explorer Fifth Generation (2011-2019)?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

580 words

Problem Statement

Learn how to diagnose and fix rear AC issues in Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Handle refrigerant with care and follow safety guidelines.

Symptoms

•Rear AC vents blowing warm or no air
•Unusual noises from the rear AC unit
•Rear AC controls not responding
•Increased humidity levels in the rear cabin
•Odor from the rear AC vents

Diagnostic Steps

1
Check the rear AC controls for power and functionality.
2
Inspect the rear AC fuse in the fuse box for any damage or blown fuses.
3
Scan the vehicle's OBD-II system for any related fault codes.
4
Verify the refrigerant level in the rear AC system using a refrigerant gauge.
5
Inspect the rear AC blower motor for operation and any obstructions.
6
Check for leaks in the rear AC lines and connections.

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
•Refrigerant gauge
•Screwdriver set
•Torque wrench
•Vacuum or compressed air source

Parts Required

•Rear AC blower motor (if replacement is necessary)
•Refrigerant (R-134a)
•Fuses (if blown)

Related Faults

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Diagnostic Steps

1
Check the rear AC controls for power and functionality.
2
Inspect the rear AC fuse in the fuse box for any damage or blown fuses.
3
Scan the vehicle's OBD-II system for any related fault codes.
4
Verify the refrigerant level in the rear AC system using a refrigerant gauge.
5
Inspect the rear AC blower motor for operation and any obstructions.
6
Check for leaks in the rear AC lines and connections.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is turned off.
Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Fuses

Locate the fuse box (typically under the dashboard or in the engine compartment).
Identify the rear AC fuse using the diagram on the fuse box cover.
Remove the fuse and inspect it; replace it if blown with a new fuse of the same amperage.

3. Check and Recharge Refrigerant

Connect a refrigerant gauge to the low-pressure service port of the rear AC system.
Check the pressure readings; if low, add the appropriate refrigerant (R-134a) until the system reaches the recommended level.
Monitor for any signs of leaks during the recharge process.

4. Inspect and Replace Rear AC Blower Motor

Access the rear AC blower motor, usually located under the rear passenger side panel.
Disconnect the electrical connector from the blower motor.
Remove the mounting screws and take out the blower motor.
Inspect for debris or damage; replace with a new blower motor if necessary.

5. Check and Clear Air Ducts

Inspect the air ducts leading to the rear AC vents for blockages or kinks.
Use a vacuum or compressed air to clear any obstructions.
Reassemble any panels removed during inspection.

6. Reconnect Battery and Test

Reconnect the battery terminals.
Start the vehicle and set the rear AC controls to the desired temperature and fan speed.
Check for proper airflow and temperature from the rear AC vents.