how to fix the AC not working in my Ford F-150 13th Generation (2015-2020) during summer

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

512 words

Problem Statement

Learn how to diagnose and fix AC not working 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 the electrical system.
•Allow the engine to cool down before working on any components.

Symptoms

•AC does not blow cold air
•AC compressor does not engage
•Unusual noises from the AC system (e.g., hissing, clicking)
•Reduced airflow from vents
•Foul odor when AC is turned on
•Dashboard warning lights related to AC system

Diagnostic Steps

1
Check the AC system for any error codes using an OBD-II scanner.
2
Inspect the AC refrigerant level using a pressure gauge.
3
Examine the AC compressor for visible signs of damage or leaks.
4
Verify that the AC compressor clutch is engaging when the AC is turned on.
5
Inspect the cabin air filter for blockage or contamination.
6
Test the AC relay and fuse for continuity and proper function.

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
•Refrigerant pressure gauge
•Socket set
•Torque wrench
•Screwdrivers
•Pliers

Parts Required

•R-134a refrigerant
•AC compressor (if needed)
•Cabin air filter

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Diagnostic Steps

1
Check the AC system for any error codes using an OBD-II scanner.
2
Inspect the AC refrigerant level using a pressure gauge.
3
Examine the AC compressor for visible signs of damage or leaks.
4
Verify that the AC compressor clutch is engaging when the AC is turned on.
5
Inspect the cabin air filter for blockage or contamination.
6
Test the AC relay and fuse for continuity and proper function.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface with the engine off.
Disconnect the battery to prevent electrical shock.

2. Check Refrigerant Level

Attach a refrigerant pressure gauge to the low-pressure service port.
If low, recover refrigerant and recharge the system to manufacturer's specifications (typically around 2-3 lbs for F-150).
Use R-134a refrigerant and ensure no leaks before recharging.

3. Inspect and Replace the AC Compressor

Remove any components obstructing access to the AC compressor (e.g., air intake ducts).
Disconnect the electrical connector and refrigerant lines from the compressor.
Unbolt the compressor from the mounting bracket.
Install the new compressor, ensuring proper torque (typically 20-25 lb-ft) on the mounting bolts.
Reconnect the refrigerant lines and electrical connector.

4. Replace Cabin Air Filter

Locate the cabin air filter access panel (usually behind the glove box).
Remove the old filter and clean the housing.
Install a new cabin air filter, ensuring it is oriented correctly (check airflow direction).

5. Test AC System

Reconnect the battery and start the engine.
Turn on the AC to the maximum setting and check for cold air.
Monitor for any unusual noises and ensure the compressor engages.