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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

633 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 touching any components.

Symptoms

•No cool air coming from the AC vents
•AC compressor not engaging
•Unusual noises from the AC system
•Condensation build-up near the AC evaporator
•Smell of refrigerant or musty odor from the vents

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any AC-related fault codes.
2
Check the refrigerant level using a manifold gauge set to ensure it is within the manufacturer's specifications.
3
Inspect the AC compressor visually for any signs of damage or leaks.
4
Verify the operation of the AC compressor clutch by checking for engagement when the AC is turned on.
5
Inspect the cabin air filter for clogs or debris that may restrict airflow.
6
Check the AC control module and fuses for proper operation.

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
•Refrigerant canister
•Safety glasses
•Gloves
•Screwdriver or trim removal tool
•Socket set
•Wrench set
•Refrigerant recovery machine

Parts Required

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

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any AC-related fault codes.
2
Check the refrigerant level using a manifold gauge set to ensure it is within the manufacturer's specifications.
3
Inspect the AC compressor visually for any signs of damage or leaks.
4
Verify the operation of the AC compressor clutch by checking for engagement when the AC is turned on.
5
Inspect the cabin air filter for clogs or debris that may restrict airflow.
6
Check the AC control module and fuses for proper operation.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to avoid electrical shorts during repairs.
Ensure the vehicle is parked on a level surface and the engine is off.

2. Recharge Refrigerant

Tools Required: Manifold gauge set, refrigerant canister, safety glasses, gloves.
Connect the manifold gauges to the low and high-pressure service ports of the AC system.
Start the engine and turn the AC to the maximum setting.
Read the gauge pressures; if the low side is below 30 psi, the system may need refrigerant.
Add refrigerant according to the manufacturer's specifications (typically R-134a).
Monitor the pressure and add refrigerant until the low side reaches approximately 30-40 psi and the high side reaches 200-250 psi.

3. Replace Cabin Air Filter

Tools Required: Screwdriver or trim removal tool.
Locate the cabin air filter access panel, usually found behind the glove compartment.
Remove the screws and the panel to access the cabin air filter.
Take out the old filter and replace it with a new one, ensuring it is oriented correctly.
Reassemble the access panel and secure it back into place.

4. Inspect and Replace AC Compressor (if necessary)

Tools Required: Socket set, wrench set, refrigerant recovery machine (if replacing).
If the AC compressor is not engaging, remove the serpentine belt by loosening the tensioner pulley.
Disconnect the electrical connector from the AC compressor and remove the refrigerant lines using the appropriate wrenches.
Unbolt the AC compressor from its mounting location.
Install the new compressor by reversing the removal steps, ensuring to use new O-rings on refrigerant lines for sealing.
Reconnect the electrical connector and install the serpentine belt.