how to fix an AC that won't turn on in a 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

600 words

Problem Statement

Learn how to diagnose and fix AC that won't turn on 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 battery before working on electrical systems.
•Allow the engine to cool before opening the hood or accessing components.

Symptoms

•AC control panel lights not illuminating
•Warm air blowing from vents despite AC being set to cold
•Unusual noises when attempting to turn on the AC
•No response from the AC compressor
•Blower motor not functioning

Diagnostic Steps

1
Check the AC control panel for any illuminated warning lights or error messages.
2
Inspect the vehicle's fuses related to the AC system for any blown fuses.
3
Use an OBD-II scanner to check for any stored trouble codes that may indicate AC system issues.
4
Test the AC compressor relay for functionality using a multimeter.
5
Verify that the blower motor is operational by testing it independently.
6
Check refrigerant levels to ensure the system is not low on refrigerant.

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
•Socket set
•Fuse puller
•Refrigerant gauge set

Parts Required

•AC fuses (if blown)
•AC compressor (if faulty)
•Blower motor (if defective)
•Refrigerant (if low)

Related Faults

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Diagnostic Steps

1
Check the AC control panel for any illuminated warning lights or error messages.
2
Inspect the vehicle's fuses related to the AC system for any blown fuses.
3
Use an OBD-II scanner to check for any stored trouble codes that may indicate AC system issues.
4
Test the AC compressor relay for functionality using a multimeter.
5
Verify that the blower motor is operational by testing it independently.
6
Check refrigerant levels to ensure the system is not low on refrigerant.

Solution

1. Preparation

Gather tools and parts.
Disconnect the negative terminal of the battery to ensure safety.

2. Inspect Fuses and Relays

Tools Required: Fuse puller, multimeter
Locate the fuse box (typically under the dashboard or hood).
Remove the AC-related fuses and visually inspect for damage.
Test fuses with a multimeter; replace any blown fuses.
Locate the AC compressor relay, remove it, and test for continuity; replace if faulty.

3. Check AC Compressor

Tools Required: Socket set, torque wrench, multimeter
Remove any covers blocking access to the AC compressor.
Inspect the electrical connections to the compressor for damage or corrosion.
Using a multimeter, check for voltage at the compressor connector when the AC is activated.
If no power is present, trace back to the relay or control module.
If power is present, test the compressor's clutch for engagement; replace the compressor if it does not engage.

4. Test Blower Motor

Tools Required: Multimeter, socket set
Locate the blower motor (often found under the dashboard on the passenger side).
Disconnect the blower motor connector.
Test for voltage at the connector while the AC is activated.
Replace the blower motor if no voltage is present or if the motor does not operate.

5. Recharge Refrigerant (if necessary)

Tools Required: Refrigerant gauge set, refrigerant canister
Connect the refrigerant gauge set to the AC service ports (high and low).
Check the pressure readings; if low, recharge the system following the manufacturer’s specifications.
Monitor for leaks during the recharge process.