why is my Ford F-150 13th Generation (2015-2020) AC not blowing cold air

Ford F-150 13th Generation (2015-2020)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

625 words

Problem Statement

Learn how to diagnose and fix AC not blowing cold air in Ford F-150 13th Generation. Step-by-step guide with symptoms, diagnostic steps, 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.
•Ensure refrigerant is recovered and disposed of properly according to local regulations.

Symptoms

•AC system blowing warm air
•Unusual noises from the AC compressor
•AC compressor does not engage
•Reduced airflow from the vents
•Increased humidity inside the cabin
•"Check AC" warning light illuminated (if equipped)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any AC-related fault codes.
2
Check the refrigerant levels using a manifold gauge set to determine if the system is low on refrigerant.
3
Inspect the AC compressor for any visible damage or signs of failure.
4
Verify that the AC system's electrical connections are secure and free from corrosion.
5
Test the AC clutch engagement; check if it engages when the AC is turned on.
6
Inspect the cabin air filter for clogs or restrictions that may 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
•Manifold gauge set
•Refrigerant canister
•Socket set
•Torque wrench

Parts Required

•R-134a refrigerant
•AC compressor (if damaged)
•AC clutch (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 AC-related fault codes.
2
Check the refrigerant levels using a manifold gauge set to determine if the system is low on refrigerant.
3
Inspect the AC compressor for any visible damage or signs of failure.
4
Verify that the AC system's electrical connections are secure and free from corrosion.
5
Test the AC clutch engagement; check if it engages when the AC is turned on.
6
Inspect the cabin air filter for clogs or restrictions that may affect airflow.

Solution

1. Preparation

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

2. Check Refrigerant Levels

Tools Required: Manifold gauge set
Connect the high and low pressure sides of the manifold gauge set to the AC service ports.
Check the pressure readings against the manufacturer's specifications.
- Sub-step: If low, proceed to recharge the system; if normal, further inspection is needed.

3. Recharge AC System (if needed)

Parts Required: R-134a refrigerant
Connect a refrigerant canister to the low-pressure service port.
Open the valve on the canister to allow refrigerant to flow into the system.
Monitor the pressure gauge and fill until the desired level is reached (typically between 25-45 psi on the low side).
Disconnect the canister and replace the service port cap.

4. Inspect and Replace Components

Parts Required: AC compressor (if faulty), AC clutch (if damaged), cabin air filter (if clogged)
If the AC compressor is not engaging or is damaged, remove it:
- Remove the serpentine belt by loosening the tensioner.
- Disconnect the electrical connector and refrigerant lines (ensure refrigerant is properly recovered).
- Unbolt the compressor and replace it with a new one, tightening bolts to manufacturer torque specifications.
Replace the cabin air filter if it's clogged to ensure proper airflow.

5. Reconnect Battery and Test AC System

Reconnect the battery.
Start the engine and turn on the AC to the maximum setting.
Observe if the AC is blowing cold air and check for any unusual noises.