why does my Ford Explorer Fifth Generation (2011-2019) AC blow warm air

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

612 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 performing any repairs on the AC system.

Symptoms

•AC system blowing warm air
•"Check AC" warning light illuminated on the dashboard
•Unusual noises from the AC compressor
•Reduced airflow from the vents
•Foul odor coming from the AC system

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for AC-related fault codes.
2
Inspect the AC refrigerant level using a manifold gauge set to determine if it is low.
3
Check the AC compressor operation by listening for engagement when the AC is turned on.
4
Examine the AC condenser for blockages or damage that could impede airflow.
5
Inspect the cabin air filter for clogs or restrictions that could affect airflow.
6
Test the AC system for leaks using a UV dye or electronic leak detector.

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
•Torque wrench
•Safety goggles
•Gloves

Parts Required

•R-134a refrigerant
•AC compressor (if needed)
•Cabin air filter
•O-rings for refrigerant lines

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for AC-related fault codes.
2
Inspect the AC refrigerant level using a manifold gauge set to determine if it is low.
3
Check the AC compressor operation by listening for engagement when the AC is turned on.
4
Examine the AC condenser for blockages or damage that could impede airflow.
5
Inspect the cabin air filter for clogs or restrictions that could affect airflow.
6
Test the AC system for leaks using a UV dye or electronic leak detector.

Solution

1. Preparation

Gather necessary tools and parts before starting.
Ensure the vehicle is parked on a level surface and the engine is turned off.
Disconnect the negative battery terminal to prevent electrical shocks.

2. Recharge the AC System

Tools Required: Manifold gauge set, refrigerant, safety goggles, gloves.
Connect the manifold gauges to the service ports of the AC system.
Check the low and high-pressure readings to determine if the system is undercharged.
If refrigerant is low, add the appropriate type (R-134a) until proper pressure readings are achieved.

3. Replace the AC Compressor (if faulty)

Tools Required: Socket set, torque wrench, AC flush kit, new compressor, new O-rings, refrigerant oil.
Remove the drive belt from the AC compressor.
Disconnect electrical connectors and refrigerant lines from the compressor.
Remove the mounting bolts and take out the old compressor.
Clean the refrigerant lines and replace O-rings.
Install the new compressor, torque the bolts to the manufacturer specifications.
Reconnect the refrigerant lines and electrical connectors.

4. Inspect and Replace the Cabin Air Filter

Tools Required: Screwdriver or trim removal tool (if necessary).
Locate the cabin air filter housing, typically behind the glove compartment.
Remove the cover and take out the old cabin air filter.
Install a new cabin air filter, ensuring it is oriented correctly.
Reassemble any covers or components.

5. Test the AC System

Reconnect the negative battery terminal.
Start the engine and turn on the AC to the maximum setting.
Monitor the temperature of the air coming from the vents to ensure it is cold.