Ford Explorer Fifth Generation (2011-2019) AC blows warm air what should I check

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

496 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

•Disconnect the battery before working on electrical components.
•Ensure the AC system is properly evacuated before servicing to avoid refrigerant exposure.

Symptoms

•AC compressor not engaging
•Warm air flowing from vents
•Unusual noises from the AC system
•Decreased airflow from the vents
•AC clutch not cycling properly
•AC control panel lights malfunctioning

Diagnostic Steps

1
Check the AC system for refrigerant levels using a manifold gauge set.
2
Inspect the AC compressor for signs of wear or damage.
3
Verify that the AC fuse and relay are functioning properly.
4
Examine the AC condenser for blockages or debris.
5
Use a multimeter to test the AC pressure switch.
6
Scan the vehicle for any diagnostic trouble codes (DTCs) related to the AC system.

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
•Socket set
•Multimeter
•Vacuum pump
•AC refrigerant R-134a

Parts Required

•AC compressor (if defective)
•AC pressure switch (if defective)
•Refrigerant R-134a

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Diagnostic Steps

1
Check the AC system for refrigerant levels using a manifold gauge set.
2
Inspect the AC compressor for signs of wear or damage.
3
Verify that the AC fuse and relay are functioning properly.
4
Examine the AC condenser for blockages or debris.
5
Use a multimeter to test the AC pressure switch.
6
Scan the vehicle for any diagnostic trouble codes (DTCs) related to the AC system.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the negative battery terminal to ensure safety.

2. Check Refrigerant Level

Connect the manifold gauge set to the low and high-pressure service ports.
Start the engine and turn the AC to the maximum setting.
Read the pressure values; if low, proceed to recharge the system.
Use R-134a refrigerant as specified for the system.

3. Inspect and Replace AC Components

AC Compressor:
- Visually inspect for leaks or damage.
- If faulty, remove the serpentine belt using a socket set.
- Disconnect the AC lines (use caution; refrigerant may still be present).
- Remove the compressor and replace it with a new unit.
- Reconnect the AC lines and torque to manufacturer specifications.
AC Pressure Switch:
- Locate the pressure switch on the AC line.
- Disconnect the electrical connector and unscrew the switch.
- Replace with a new switch and reconnect the electrical connector.

4. Test and Recharge AC System

After replacing any faulty components, vacuum the AC system using a vacuum pump to remove moisture.
Recharge the system with the correct amount of R-134a refrigerant.
Check for leaks using a UV dye or electronic leak detector.