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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

582 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

•Ensure the vehicle is turned off and parked on a flat surface before starting repairs
•Disconnect battery before working on electrical systems
•Allow the engine to cool before opening the radiator or working near hot components

Symptoms

•Air conditioning system blowing warm air
•Unusual noises from the AC compressor
•AC compressor not engaging
•Dashboard temperature control not functioning properly
•Foul odors coming from the AC vents
•Refrigerant leaks visible under the vehicle

Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Check refrigerant levels using a refrigerant gauge set
3
Inspect AC compressor for any signs of damage or leaks
4
Examine electrical connections related to the AC system for corrosion or loose connections
5
Test AC clutch operation to see if it engages when the AC is turned on
6
Inspect and replace the cabin air filter if it is dirty or clogged

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 set
•Basic hand tools (screwdrivers, socket set)
•Safety goggles

Parts Required

•Refrigerant (R-134a or R-1234yf)
•AC compressor (if faulty)
•Cabin air filter

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Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Check refrigerant levels using a refrigerant gauge set
3
Inspect AC compressor for any signs of damage or leaks
4
Examine electrical connections related to the AC system for corrosion or loose connections
5
Test AC clutch operation to see if it engages when the AC is turned on
6
Inspect and replace the cabin air filter if it is dirty or clogged

Solution

1. Preparation

Tools Required: OBD-II scanner, refrigerant gauge set, basic hand tools (screwdrivers, socket set), and safety goggles.
Safety Warnings: Ensure the vehicle is turned off and parked on a flat surface before starting repairs.

2. Recharge Refrigerant

Sub-steps:
1. Connect the refrigerant gauge set to the low and high-pressure service ports.
2. Check the pressure readings. If low, proceed to recharge the system.
3. Add the appropriate refrigerant (R-134a or R-1234yf as applicable) until the correct pressure is achieved according to manufacturer specifications.

3. Replace AC Compressor (if faulty)

Sub-steps:
1. Disconnect the battery to prevent electrical shock.
2. Remove the drive belt from the AC compressor.
3. Disconnect electrical connectors and refrigerant lines from the compressor.
4. Unbolt the AC compressor from its mounting bracket and remove it from the engine bay.
5. Install the new compressor in reverse order, ensuring to use new seals and torque the bolts to manufacturer specifications.

4. Replace Cabin Air Filter

Sub-steps:
1. Locate the cabin air filter housing (usually behind the glove box).
2. Remove the glove box if necessary to access the filter.
3. Pull out the old cabin air filter and insert the new one, ensuring the airflow direction matches the indicated markings.
4. Reassemble the glove box.