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

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

577 words

Problem Statement

Learn how to diagnose and fix the AC not blowing cold air in Ford F-150 (2015-2020). 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.
•Allow the engine to cool before performing any repairs on the AC components.

Symptoms

•Warm air blowing from the vents
•AC compressor not engaging
•Unusual noises from the AC system when switched on
•Foggy or cloudy windshield due to humidity
•Poor airflow from the vents
•AC system warning light illuminated on the dashboard

Diagnostic Steps

1
Check the AC system's refrigerant level using a manifold gauge set.
2
Inspect the AC compressor for signs of damage or wear.
3
Verify that the AC fuse and relay are functioning properly.
4
Scan the vehicle for any error codes related to the HVAC system using an OBD-II scanner.
5
Inspect the cabin air filter for clogs or dirt that could restrict airflow.
6
Check for leaks in the AC system components, such as hoses and fittings.

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
•Wrench set
•Multimeter

Parts Required

•AC refrigerant
•AC compressor (if necessary)
•AC system fuses/relays (if necessary)
•Cabin air filter (if dirty)

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Diagnostic Steps

1
Check the AC system's refrigerant level using a manifold gauge set.
2
Inspect the AC compressor for signs of damage or wear.
3
Verify that the AC fuse and relay are functioning properly.
4
Scan the vehicle for any error codes related to the HVAC system using an OBD-II scanner.
5
Inspect the cabin air filter for clogs or dirt that could restrict airflow.
6
Check for leaks in the AC system components, such as hoses and fittings.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shock.
Ensure the vehicle is parked on a flat surface and the engine is off.

2. Recharge the Refrigerant

Tools Required: Manifold gauge set, refrigerant canister
Connect the manifold gauges to the low and high-pressure service ports.
Start the engine and turn the AC to the maximum setting.
Check the pressure readings; if low, proceed to recharge the system.
Slowly add refrigerant until the appropriate pressure is reached as per the specifications in the service manual.
Disconnect the manifold gauges and reconnect the service port caps.

3. Inspect and Replace AC Compressor (if necessary)

Tools Required: Socket set, wrench set, AC compressor replacement
Locate the AC compressor and visually inspect for any signs of damage or leaks.
Remove the serpentine belt from the AC compressor pulley.
Disconnect the electrical connector and the refrigerant lines from the compressor.
Unbolt the compressor from its mounting bracket and remove it from the engine bay.
Install the new compressor in the reverse order of removal, ensuring to torque the bolts to manufacturer specifications.

4. Check Electrical Components

Tools Required: Multimeter
Use a multimeter to check the AC relay and fuses for continuity.
Replace any faulty fuses or relays with the correct amp rating.
Reconnect the negative battery terminal and test the AC system.