how to repair the rear AC not working in Ford Explorer Sixth Generation (2020-present)?

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

560 words

Problem Statement

Learn how to diagnose and repair the rear AC not working in Ford Explorer (2020-present). Step-by-step guide with symptoms, tools, and solutions.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the system to depressurize if working with refrigerants.

Symptoms

•Rear AC vents blowing warm air
•Rear AC controls unresponsive
•Unusual noises from the rear AC unit
•Check engine or AC warning light illuminated on the dashboard
•Reduced airflow from rear vents compared to front vents

Diagnostic Steps

1
Inspect the rear AC control module for any visible damage or loose connections.
2
Check the refrigerant level in the AC system using a pressure gauge.
3
Scan the vehicle’s computer for any error codes related to the climate control system.
4
Ensure the rear AC blower motor is operational by testing it directly.
5
Inspect the rear AC evaporator for blockages or leaks.

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

•Refrigerant gauge
•Refrigerant canister
•Socket set
•Multimeter
•OBD-II scanner

Parts Required

•Blower motor (if faulty)
•Rear AC control module (if faulty)
•Refrigerant (R-134a)

Related Faults

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Diagnostic Steps

1
Inspect the rear AC control module for any visible damage or loose connections.
2
Check the refrigerant level in the AC system using a pressure gauge.
3
Scan the vehicle’s computer for any error codes related to the climate control system.
4
Ensure the rear AC blower motor is operational by testing it directly.
5
Inspect the rear AC evaporator for blockages or leaks.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to ensure safety during repairs.
Allow the vehicle to cool down if it has been running.

2. Check and Recharge Refrigerant

Tools Required: Refrigerant gauge, refrigerant canister
Attach the refrigerant gauge to the low-pressure service port.
Check the pressure readings and determine if the refrigerant level is low.
If low, add the correct type of refrigerant (usually R-134a) until proper levels are reached.

3. Inspect and Replace Blower Motor (if necessary)

Tools Required: Socket set, multimeter
Remove the rear AC blower motor cover by unscrewing the retaining screws.
Disconnect the electrical connector from the blower motor.
Use a multimeter to check for voltage at the connector while the rear AC is turned on.
If no voltage is present, trace the wiring for faults. If voltage is present but the blower motor does not operate, replace the blower motor.
- To replace, unbolt the blower motor from its mounting and install a new one, reconnecting the electrical connector.

4. Repair or Replace Control Module (if necessary)

Tools Required: OBD-II scanner, socket set
If the control module is suspected to be faulty, remove the dashboard panel to access the rear AC control module.
Disconnect the module and inspect the connectors for damage.
If damaged, replace the control module with a new one, ensuring all connections are secure.

5. Reassemble and Test

Reinstall any panels or covers removed during the process.
Reconnect the vehicle battery.
Start the vehicle and test the rear AC functionality to ensure proper operation.