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

567 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 systems.
•Allow the engine to cool before opening the hood or working on the AC system.

Symptoms

•AC compressor not engaging
•Warm air from vents regardless of temperature setting
•Unusual noise from the AC system (e.g., hissing or clicking)
•Moisture or water pooling inside the vehicle
•AC system cycling on and off frequently
•Bad odor coming from the AC vents

Diagnostic Steps

1
Check the AC system for error codes using an OBD-II scanner.
2
Inspect the AC compressor for signs of wear or damage.
3
Verify the refrigerant level and look for any leaks.
4
Test the AC clutch operation to ensure it is engaging properly.
5
Examine the cabin air filter for clogs or blockages.
6
Inspect the AC condenser for debris or physical damage.

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
•Multimeter
•Hose or compressed air
•Screwdriver or socket set

Parts Required

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

Related Faults

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Diagnostic Steps

1
Check the AC system for error codes using an OBD-II scanner.
2
Inspect the AC compressor for signs of wear or damage.
3
Verify the refrigerant level and look for any leaks.
4
Test the AC clutch operation to ensure it is engaging properly.
5
Examine the cabin air filter for clogs or blockages.
6
Inspect the AC condenser for debris or physical damage.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the battery to ensure safety while working on electrical components.

2. Check Refrigerant Levels

Tools Required: Refrigerant gauge set
Connect the low-pressure gauge to the service port.
Read the pressure; it should be within the manufacturer's specified range.
If low, proceed to recharge the system with the appropriate refrigerant type (R-134a).
Monitor for leaks during the recharge.

3. Inspect and Replace Cabin Air Filter

Tools Required: Screwdriver or socket set (depending on the model)
Locate the cabin air filter access panel, usually under the glove box.
Remove the panel and extract the old filter.
Inspect for debris and replace with a new cabin air filter if dirty.

4. Test AC Compressor and Clutch

Tools Required: Multimeter
Reconnect the battery and turn on the AC to the maximum setting.
Use a multimeter to check for voltage at the AC compressor clutch connector.
If no voltage is present, trace back to the relay and fuses for faults; replace as necessary.
If voltage is present but the clutch does not engage, the compressor may need replacement.

5. Clear AC Condenser and Check for Blockages

Tools Required: Hose or compressed air
Inspect the AC condenser for dirt or debris.
Use a hose or compressed air to clean out any obstructions.
If damaged, consider replacing the condenser.