how to troubleshoot the rear air conditioning not working in my Ford Explorer Fifth Generation (2011...

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

541 words

Problem Statement

Learn how to troubleshoot and fix rear air conditioning issues in Ford Explorer (2011-2019). Step-by-step guide with diagnostic steps and solutions.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow the engine to cool before inspecting the AC system.

Symptoms

•Rear air conditioning vents do not blow cold air
•Unusual noises from the rear AC unit
•Rear AC control panel unresponsive
•Front AC functioning properly while rear does not
•Odor from rear AC vents when activated

Diagnostic Steps

1
Check the rear AC control settings to ensure they are set correctly.
2
Inspect the rear AC fuse using the fuse box diagram; replace if blown.
3
Scan for any error codes using an OBD-II scanner to identify any related issues.
4
Inspect the rear AC blower motor for proper operation by testing with a multimeter.
5
Check refrigerant levels in the AC system; low levels can impact rear AC performance.
6
Examine the rear AC ductwork 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

•OBD-II scanner
•Multimeter
•Refrigerant gauge set
•Screwdriver set
•Basic hand tools

Parts Required

•Rear AC fuse (as needed)
•Rear AC blower motor (if faulty)
•Refrigerant (if low)

Related Faults

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Diagnostic Steps

1
Check the rear AC control settings to ensure they are set correctly.
2
Inspect the rear AC fuse using the fuse box diagram; replace if blown.
3
Scan for any error codes using an OBD-II scanner to identify any related issues.
4
Inspect the rear AC blower motor for proper operation by testing with a multimeter.
5
Check refrigerant levels in the AC system; low levels can impact rear AC performance.
6
Examine the rear AC ductwork for blockages or leaks.

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, screwdriver set, basic hand tools, refrigerant gauge set.
Disconnect the battery to ensure safety while working on electrical components.

2. Check and Replace Rear AC Fuse

Locate the fuse box under the dashboard or in the engine compartment.
Identify the rear AC fuse using the fuse diagram.
Remove the fuse and inspect for continuity with a multimeter.
If blown, replace it with a fuse of the same amperage.

3. Inspect and Test Rear AC Blower Motor

Remove the access panel to the rear AC unit, typically located in the headliner or beneath the rear seat.
Disconnect the blower motor connector.
Use a multimeter to test for voltage at the connector while the rear AC is activated.
If voltage is present but the motor does not run, replace the blower motor.

4. Check Refrigerant Levels

Connect the refrigerant gauge set to the service ports on the AC system.
Start the engine and activate the AC system.
Check the refrigerant levels and pressure readings; if low, recharge the system using the manufacturer-recommended refrigerant.

5. Inspect for Duct Blockages

Remove any access panels necessary to view the ductwork leading to the rear AC vents.
Check for any blockages such as debris or foreign objects.
Clear any obstructions found in the ductwork.