why is my Ford Explorer Fifth Generation (2011-2019) blowing hot air from the AC?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

577 words

Problem Statement

Learn how to diagnose and fix AC blowing hot air in Ford Explorer 2011-2019. 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 systems.
•Always recover refrigerant from the AC system before servicing; do not vent to the atmosphere.

Symptoms

•Air conditioning system blowing hot air instead of cold
•AC compressor not engaging
•Unusual noises from the AC compressor
•Warm air from vents even when set to low temperature
•Fluctuating air temperature when driving

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any AC-related faults.
2
Inspect the AC refrigerant level using a refrigerant gauge.
3
Check for any visible leaks in the AC system components.
4
Test the AC compressor operation by observing if the clutch engages when AC is turned on.
5
Inspect the cabin air filter for clogs or restrictions.
6
Verify the operation of the climate control system and blend door actuator.

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 gauge
•Manifold gauge set
•Socket set
•Wrenches

Parts Required

•AC refrigerant
•AC compressor (if found faulty)
•Cabin air filter

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any AC-related faults.
2
Inspect the AC refrigerant level using a refrigerant gauge.
3
Check for any visible leaks in the AC system components.
4
Test the AC compressor operation by observing if the clutch engages when AC is turned on.
5
Inspect the cabin air filter for clogs or restrictions.
6
Verify the operation of the climate control system and blend door actuator.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery negative terminal for safety.

2. Recharge the AC System

Tools Required: Refrigerant gauge, refrigerant can, manifold gauge set.
Check the refrigerant level with the gauge. If low, proceed to recharge.
Attach the refrigerant can to the low-pressure port.
Open the valve on the refrigerant can and let the system recharge until the proper level is reached as indicated by the gauge.
Monitor the pressure to avoid overcharging.

3. Inspect and Replace AC Components

Tools Required: Socket set, wrenches.
If the compressor is not engaging, check the electrical connections and fuses related to the AC system.
If the AC compressor is faulty, remove the old compressor by:
- Disconnecting the electrical connector.
- Removing the refrigerant lines (ensure the system is properly evacuated).
- Unbolting the compressor from its mounting points.
- Installing the new compressor in reverse order, ensuring connections are tight.
Replace any damaged or leaking hoses.

4. Replace Cabin Air Filter

Tools Required: None specifically.
Locate the cabin air filter access panel; usually under the glove compartment.
Remove the old filter and install a new one, ensuring it is oriented correctly for airflow.

5. Verify System Operation

Reconnect the battery and start the vehicle.
Turn on the AC system and set to maximum cooling.
Observe whether cold air is now being produced from the vents.