why does my Ford Explorer Fifth Generation (2011-2019) AC blow warm air

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

561 words

Problem Statement

Complete guide to fixing AC that blows warm air in Ford Explorer 2011-2019. Includes symptoms, diagnostic steps, tools required, and repair procedures.

Affected Component

HVAC

Estimated Time

2-4 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 compressor not engaging
•Warm air blowing from vents
•Unusual noises coming from the AC system
•AC clutch cycling on and off rapidly
•Increased humidity inside the vehicle
•Foul odors when the AC is turned on

Diagnostic Steps

1
Check the AC system for refrigerant levels using a manifold gauge set.
2
Inspect the AC compressor for any visible damage or leaks.
3
Verify that the AC compressor clutch is engaging when the AC is turned on.
4
Examine the fuses and relays related to the AC system for any blown components.
5
Use an OBD-II scanner to check for any error codes related to the AC system.
6
Inspect the cabin air filter for blockage or contamination that may affect airflow.

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

•Manifold gauge set
•Socket set
•Torque wrench

Parts Required

•R-134A refrigerant
•AC compressor (if needed)
•Cabin air filter

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Diagnostic Steps

1
Check the AC system for refrigerant levels using a manifold gauge set.
2
Inspect the AC compressor for any visible damage or leaks.
3
Verify that the AC compressor clutch is engaging when the AC is turned on.
4
Examine the fuses and relays related to the AC system for any blown components.
5
Use an OBD-II scanner to check for any error codes related to the AC system.
6
Inspect the cabin air filter for blockage or contamination that may affect airflow.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is on a flat surface and the engine is turned off.
Disconnect the battery to ensure safety while working on electrical components.

2. Check Refrigerant Levels

Tools Required: Manifold gauge set
Connect the low and high-pressure hoses from the manifold gauge to the AC service ports.
Start the engine and turn the AC to the maximum setting.
Read the pressure levels on the gauges: if low, proceed to recharge the system.

3. Recharge AC System

Parts Required: R-134A refrigerant
Using the manifold gauge set, add refrigerant until the correct pressure is achieved (consult specifications for ideal pressure).
Monitor the gauges to ensure the system is not overcharged.

4. Inspect and Replace AC Compressor

Tools Required: Socket set, torque wrench
Remove the drive belt from the AC compressor.
Unbolt the AC compressor from its mounting brackets.
Disconnect the electrical connector and refrigerant lines (ensure refrigerant has been evacuated).
Install the new compressor by reversing the removal steps.
Torque the bolts to manufacturer specifications and reconnect the drive belt.

5. Check and Replace Cabin Air Filter

Tools Required: None required
Locate the cabin air filter compartment (usually behind the glove box).
Remove the old filter and inspect for dirt or blockage.
Install a new cabin air filter ensuring it is oriented correctly.