my Ford Explorer's AC is blowing warm air what’s the fix

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

597 words

Problem Statement

Learn how to diagnose and fix the AC blowing warm air issue in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Be cautious when handling refrigerants, as they can be harmful if inhaled or if they come into contact with skin.

Symptoms

•AC system not cooling air
•Unusual noises from the AC compressor
•AC compressor clutch not engaging
•Condenser or evaporator freezing
•Moisture or refrigerant leaks under the vehicle
•Increased cabin humidity

Diagnostic Steps

1
Check the AC system for any visible leaks of refrigerant.
2
Inspect the AC compressor for proper operation and engagement of the clutch.
3
Scan the vehicle's onboard computer for any error codes related to the HVAC system.
4
Measure the refrigerant level using a manifold gauge set.
5
Verify the function of the blower motor and cabin air filter for airflow issues.
6
Inspect the AC condenser and evaporator for blockages or debris.

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
•Refrigerant can
•Safety goggles
•Socket set
•Wrenches
•Torque wrench
•AC compressor removal tool
•Flathead screwdriver

Parts Required

•Refrigerant
•AC compressor (if faulty)
•Cabin air filter (if needed)

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Diagnostic Steps

1
Check the AC system for any visible leaks of refrigerant.
2
Inspect the AC compressor for proper operation and engagement of the clutch.
3
Scan the vehicle's onboard computer for any error codes related to the HVAC system.
4
Measure the refrigerant level using a manifold gauge set.
5
Verify the function of the blower motor and cabin air filter for airflow issues.
6
Inspect the AC condenser and evaporator for blockages or debris.

Solution

1. Preparation

Gather tools and parts required for the repair.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to ensure safety.

2. Recharge Refrigerant

Tools Required: Manifold gauge set, refrigerant can, safety goggles.
Connect the low-pressure side of the manifold gauge to the AC service port.
Start the engine and turn the AC to the maximum setting.
Check the pressure readings on the manifold gauge. If low, add refrigerant according to the manufacturer’s specifications.
Monitor the system while adding refrigerant until optimal pressure is reached.

3. Replace AC Compressor (if needed)

Tools Required: Socket set, wrenches, AC compressor removal tool, torque wrench.
Disconnect the battery.
Remove the drive belt by releasing tension on the tensioner.
Disconnect the electrical connectors and refrigerant lines from the AC compressor.
Unbolt the AC compressor from its mounting bracket and remove it from the engine bay.
Install the new AC compressor and torque the bolts to manufacturer specifications.
Reconnect refrigerant lines and electrical connectors.

4. Replace Cabin Air Filter (if required)

Tools Required: None, but a flathead screwdriver may assist.
Locate the cabin air filter access panel, usually under the dashboard or behind the glove box.
Remove the panel and take out the old filter.
Install the new cabin air filter in the correct orientation and secure the access panel.

5. Reconnect Battery and Test

Reconnect the battery.
Start the vehicle and run the AC system to check for proper cooling and function.
Monitor for any unusual noises or issues.