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

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

527 words

Problem Statement

Complete guide to fixing AC that blows warm air in Ford Explorer. 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.
•Ensure the refrigerant recovery machine is used as per safety guidelines.

Symptoms

•AC compressor not engaging
•Warm air blowing from vents
•Unusual noises from the AC system
•AC clutch not cycling
•Visible leaks of refrigerant or oily residue around AC components

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any AC-related faults.
2
Check the refrigerant level with a manifold gauge set to determine if it's undercharged or overcharged.
3
Inspect the AC compressor for signs of damage or failure.
4
Verify that the AC clutch is engaging when the AC is turned on.
5
Check the condition of the AC relay and fuses in the fuse box.
6
Inspect the cabin air filter for blockage or dirt.

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
•Refrigerant recovery machine
•Torque wrench

Parts Required

•Refrigerant (R-134a or specified)
•AC compressor (if needed)
•AC relay (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any AC-related faults.
2
Check the refrigerant level with a manifold gauge set to determine if it's undercharged or overcharged.
3
Inspect the AC compressor for signs of damage or failure.
4
Verify that the AC clutch is engaging when the AC is turned on.
5
Check the condition of the AC relay and fuses in the fuse box.
6
Inspect the cabin air filter for blockage or dirt.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety during repairs.
Allow the vehicle to cool down before starting work.

2. Recharge Refrigerant

Use a refrigerant recovery machine to recover any existing refrigerant from the system.
Connect the manifold gauges to the AC service ports.
Check the low and high-pressure readings to confirm the system status.
If low, add the appropriate type of refrigerant (R-134a or as specified) until the correct pressure is reached.

3. Replace AC Components (if necessary)

AC Compressor Replacement:
- Remove the serpentine belt from the AC compressor using a socket set.
- Disconnect the electrical connector and refrigerant lines from the compressor.
- Remove the mounting bolts and take out the old compressor.
- Install the new compressor by reversing the removal steps and ensuring proper torque on bolts (usually around 20-30 ft-lbs).
AC Clutch or Relay Replacement:
- Access the relay box to replace the relay if the AC clutch is not engaging.
- Swap the faulty relay with a new one (check for proper part number).

4. Reassemble and Test

Reconnect all components, ensuring there are no loose connections.
Reconnect the battery and perform a system test to confirm the AC is functioning properly.
Monitor for any unusual noises or leaks after the repair.