why does my Ford Explorer Sixth Generation (2020-present) AC blow warm air

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

600 words

Problem Statement

Learn how to diagnose and fix AC blowing warm air in Ford Explorer (2020-present). 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.
•Use proper safety equipment when handling refrigerants.

Symptoms

•Warm air blowing from the AC vents
•AC compressor not engaging
•Unusual noises when the AC is turned on
•Increased humidity inside the vehicle
•AC system cycling on and off frequently
•Foul smell from the AC vents

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for AC-related faults.
2
Inspect the AC compressor for visible damage or leaks.
3
Check the refrigerant levels using a manifold gauge set.
4
Verify the operation of the AC clutch by observing if it engages when the AC is turned on.
5
Inspect the cabin air filter for clogs or restrictions.
6
Test the AC system temperature differential between the inlet and outlet vents.

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
•Manifold gauge set
•Socket set
•Wrench set
•Torque wrench

Parts Required

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

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for AC-related faults.
2
Inspect the AC compressor for visible damage or leaks.
3
Check the refrigerant levels using a manifold gauge set.
4
Verify the operation of the AC clutch by observing if it engages when the AC is turned on.
5
Inspect the cabin air filter for clogs or restrictions.
6
Test the AC system temperature differential between the inlet and outlet vents.

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 to ensure safety while working on electrical components.

2. Check and Recharge Refrigerant

Tools Required: Manifold gauge set, refrigerant (R-134a or R-1234yf as applicable).
Connect the manifold gauge set to the low and high-pressure service ports.
Start the engine and turn the AC to the maximum setting.
Check the pressure readings:
- If low, add refrigerant slowly while monitoring the pressure until it reaches the manufacturer's specifications.
- If pressures are normal but warm air persists, proceed to the next step.

3. Inspect and Replace the AC Compressor

Tools Required: Socket set, wrench set, torque wrench, AC compressor replacement kit (if needed).
Locate the AC compressor and remove the drive belt by releasing tension on the tensioner pulley.
Disconnect the electrical connector from the compressor and remove the refrigerant lines (using proper safety equipment to capture refrigerant).
Remove the mounting bolts and take out the old compressor.
Install the new compressor in reverse order, ensuring to torque the bolts to manufacturer's specifications and reconnect the refrigerant lines.

4. Replace Cabin Air Filter

Tools Required: None (may require hand tools for certain models).
Locate the cabin air filter housing, usually behind the glove compartment.
Remove the cover and take out the old filter.
Install the new cabin air filter, ensuring proper orientation as indicated in the housing.

5. Finalize and Test

Reconnect the battery and start the vehicle.
Turn on the AC and monitor the output temperature from the vents.
Check for any leaks around the newly installed components.