Ford Explorer Fifth Generation (2011-2019) AC blowing warm air, how do I fix it?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

534 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 inspecting or working on the AC system.

Symptoms

•Air conditioning system not cooling properly
•AC compressor not engaging
•Strange noises when the AC is turned on
•Moisture or ice buildup on the AC lines
•Foul odor coming from the vents
•Erratic temperature control from the AC system

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related fault codes.
2
Inspect the AC system for visible leaks or damage, particularly around the compressor and hoses.
3
Check the refrigerant level using a manifold gauge set to determine if the system is undercharged.
4
Verify that the AC compressor engages when the system is turned on.
5
Test the AC blower motor and switch to ensure they are functioning correctly.
6
Inspect the cabin air filter for dirt or blockage that could affect airflow.

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
•AC manifold gauge set
•Socket set
•Torque wrench
•Screwdrivers
•Safety glasses
•Gloves

Parts Required

•R-134a refrigerant
•AC compressor (if needed)
•Expansion valve or orifice tube (if needed)
•Cabin air filter

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related fault codes.
2
Inspect the AC system for visible leaks or damage, particularly around the compressor and hoses.
3
Check the refrigerant level using a manifold gauge set to determine if the system is undercharged.
4
Verify that the AC compressor engages when the system is turned on.
5
Test the AC blower motor and switch to ensure they are functioning correctly.
6
Inspect the cabin air filter for dirt or blockage that could affect airflow.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety while working on the AC system.

2. Check and Recharge Refrigerant

Use an AC manifold gauge set to check refrigerant levels.
- If low, proceed to recharge the system with the appropriate R-134a refrigerant.
- Connect the low-pressure side of the manifold gauge to the low-pressure service port.
- Add refrigerant slowly while monitoring the gauge until levels are within manufacturer specifications.

3. Inspect and Replace AC Components

Inspect the AC Compressor:
- Check for physical damage or leaks.
- If the compressor isn't engaging, test the electrical connections and relay.
- Replace the compressor if faulty.
Check and Replace Expansion Valve or Orifice Tube:
- If refrigerant levels are adequate but cooling is insufficient, inspect the expansion valve or orifice tube for blockages.
- Replace if necessary.

4. Clean or Replace Cabin Air Filter

Locate the cabin air filter, typically accessed behind the glove box.
Remove the filter and inspect it for dirt and debris.
Clean or replace the filter if it is clogged.

5. Reassemble and Test System

Reconnect the battery.
Start the vehicle and turn on the AC.
Monitor the system for proper operation and ensure cold air is being produced.