what could cause my Ford Explorer to have an AC compressor failure?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

3-5 hours

Time

medium

Difficulty

medium

Severity

3 min read

528 words

Problem Statement

Learn how to diagnose and fix AC compressor failure in Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

HVAC

Estimated Time

3-5 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always wear gloves and goggles when handling refrigerants.
•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before servicing any components.

Symptoms

•AC system is not blowing cold air
•Unusual noises (clanking, grinding) coming from the compressor
•Compressor clutch not engaging
•Frequent cycling of the AC system
•Refrigerant leaks observed around the compressor
•Increased engine temperature

Diagnostic Steps

1
Inspect the AC system for visible signs of refrigerant leaks.
2
Use an OBD-II scanner to check for any related error codes.
3
Test the AC compressor clutch operation to see if it engages when the AC is turned on.
4
Measure the refrigerant pressure using a manifold gauge set to ensure it's within specifications.
5
Check the electrical connections and fuses related to the AC compressor.
6
Inspect the serpentine belt for wear and proper tension.

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

•Safety gloves
•Safety goggles
•OBD-II scanner
•Manifold gauge set
•Basic hand tools

Parts Required

•New or remanufactured AC compressor
•Accumulator/drier (if necessary)
•Refrigerant (R-134a or R-1234yf, depending on model year)

Related Faults

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Diagnostic Steps

1
Inspect the AC system for visible signs of refrigerant leaks.
2
Use an OBD-II scanner to check for any related error codes.
3
Test the AC compressor clutch operation to see if it engages when the AC is turned on.
4
Measure the refrigerant pressure using a manifold gauge set to ensure it's within specifications.
5
Check the electrical connections and fuses related to the AC compressor.
6
Inspect the serpentine belt for wear and proper tension.

Solution

1. Preparation

Tools Required: Safety gloves, goggles, OBD-II scanner, manifold gauge set, basic hand tools
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the negative battery cable to prevent electrical shorts.

2. Recover Refrigerant

Connect the manifold gauge set to the AC system service ports.
Follow appropriate procedures to recover refrigerant safely.
Safety Warning: Always wear gloves and goggles when handling refrigerants.

3. Remove AC Compressor

Remove components obstructing access to the compressor (e.g., intake hoses).
Disconnect the electrical connector from the AC compressor.
Remove the serpentine belt from the compressor pulley.
Unbolt the compressor from its mounting brackets and remove it from the engine bay.

4. Inspect and Replace Components

Inspect the compressor for internal damage or wear.
Check the accumulator/drier and expansion valve for clogs or damage; replace if necessary.
Replace the AC compressor with a new or remanufactured unit, ensuring that it is compatible with the Ford Explorer model.

5. Reassemble and Recharge System

Reinstall the compressor, tightening bolts to manufacturer specifications (usually around 20-30 ft-lbs).
Reconnect the electrical connector and reinstall the serpentine belt.
Replace the accumulator/drier if it was removed, and ensure all connections are secure.
Recharge the AC system with the appropriate amount of refrigerant.