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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

580 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.
•Allow the engine to cool down before inspecting or repairing the AC system.

Symptoms

•AC system not cooling the air
•Unusual noises from the AC compressor
•Increased engine temperature
•AC compressor not engaging
•Presence of refrigerant leaks (oil spots or puddles)
•Low airflow from AC vents

Diagnostic Steps

1
Scan the vehicle’s onboard diagnostics (OBD-II) for any AC-related error codes.
2
Check the refrigerant level using a manifold gauge set.
3
Inspect the AC compressor for signs of engagement and any unusual noises.
4
Verify the function of the AC clutch and relay.
5
Check for any blockages in the AC condenser and evaporator.
6
Inspect the cabin air filter for clogs or restrictions.

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
•Multimeter
•Basic hand tools

Parts Required

•Refrigerant (R-134a)
•AC compressor (if needed)
•AC relay (if needed)
•Cabin air filter (if needed)

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Diagnostic Steps

1
Scan the vehicle’s onboard diagnostics (OBD-II) for any AC-related error codes.
2
Check the refrigerant level using a manifold gauge set.
3
Inspect the AC compressor for signs of engagement and any unusual noises.
4
Verify the function of the AC clutch and relay.
5
Check for any blockages in the AC condenser and evaporator.
6
Inspect the cabin air filter for clogs or restrictions.

Solution

1. Preparation

Gather tools: OBD-II scanner, manifold gauge set, socket set, multimeter, and basic hand tools.
Ensure the vehicle is parked on a flat surface and the engine is off.
Disconnect the battery to ensure safety.

2. Refrigerant Recharge

1.1. Inspect Refrigerant Level
- Connect the manifold gauge set to the AC service ports (low and high).
- Check the readings; if low, proceed to recharge.
1.2. Recharge the System
- Use the appropriate refrigerant (R-134a for this model).
- Follow the instructions on the refrigerant can for proper filling procedures.
- Monitor the pressure as you fill, aiming for the manufacturer’s specifications.

3. AC Compressor Inspection

2.1. Check AC Compressor Function
- Start the vehicle and turn on the AC to the maximum setting.
- Observe the AC compressor; it should engage and produce a noticeable drop in pressure on the low side gauge.
2.2. Replace AC Compressor (if necessary)
- If the compressor isn’t engaging, check the electrical connections and replace the compressor if faulty.
- Remove the serpentine belt, unbolt the compressor, and disconnect the refrigerant lines (recover refrigerant if necessary).
- Install the new compressor, reconnect lines, and reassemble components.

4. Electrical Component Check

3.1. Test the AC Clutch
- Use a multimeter to test the AC clutch coil for continuity.
- If there is no continuity, replace the clutch assembly.
3.2. Replace the AC Relay
- Locate the AC relay in the fuse box and check for functionality.
- Replace it if faulty.

5. Final Assembly and Testing

Reconnect the battery.
Start the vehicle and test the AC system for proper operation.
Monitor for any unusual noises or performance issues.