how to diagnose Ford Explorer Fifth Generation (2011-2019) AC compressor issues?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

4-8 hours

Time

hard

Difficulty

medium

Severity

3 min read

530 words

Problem Statement

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

Affected Component

HVAC

Estimated Time

4-8 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•AC not blowing cold air
•Unusual noises from the compressor (e.g., grinding or hissing)
•AC clutch not engaging
•High or low refrigerant pressure readings
•Increased cabin humidity
•Visible refrigerant leaks around compressor

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related faults.
2
Inspect the AC compressor visually for signs of damage or leaks.
3
Check the AC system refrigerant level using a refrigerant gauge.
4
Test the AC clutch operation by observing if it engages when the AC is turned on.
5
Use a multimeter to measure the voltage at the compressor connector while the AC is on.
6
Inspect the AC relay and fuses for continuity and proper operation.

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 recovery machine
•Refrigerant gauge set
•Socket set
•Multimeter
•Line wrench

Parts Required

•AC compressor
•Receiver/drier or expansion valve
•O-rings and seals

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related faults.
2
Inspect the AC compressor visually for signs of damage or leaks.
3
Check the AC system refrigerant level using a refrigerant gauge.
4
Test the AC clutch operation by observing if it engages when the AC is turned on.
5
Use a multimeter to measure the voltage at the compressor connector while the AC is on.
6
Inspect the AC relay and fuses for continuity and proper operation.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to prevent electrical shock.
Ensure the vehicle is on a flat surface and safely supported.

2. Recover Refrigerant

Use a refrigerant recovery machine to safely remove refrigerant from the AC system.
Follow the machine's operational guidelines for proper recovery.

3. Remove AC Compressor

Remove any components obstructing access to the compressor (e.g., engine covers, belts).
Disconnect the AC lines from the compressor using a line wrench to prevent damage.
Unbolt the compressor from its mounting brackets using a socket set.
Carefully remove the compressor from the engine bay.

4. Inspect and Replace Components

Inspect the compressor for damage; if defective, replace it with a new unit.
Check and replace the receiver/drier or expansion valve, as recommended by the manufacturer.
Ensure to replace any O-rings and seals to prevent leaks.

5. Install New Compressor

Position the new compressor in place and secure it with bolts.
Reconnect the AC lines, ensuring they are tightened to the manufacturer’s specifications.
Reinstall any components that were removed during disassembly.

6. Recharge AC System

Use a refrigerant scale to accurately charge the system with the specified amount of refrigerant.
Start the engine and turn on the AC to check for proper operation.