how to fix the rear air conditioning not working in my Ford F-150

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

505 words

Problem Statement

Learn how to diagnose and fix the rear A/C not working in Ford F-150. 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 battery before working on electrical systems.
•Allow engine to cool before working on the A/C system.

Symptoms

•Rear air conditioning vents are blowing warm air
•Rear air conditioning fan is not operational
•No cool air coming from rear vents
•Unusual noises from the rear air conditioning unit
•Front air conditioning is functioning properly

Diagnostic Steps

1
Check the rear air conditioning system fuse using the vehicle’s fuse box diagram.
2
Inspect the rear A/C control module for any visible damage or disconnections.
3
Verify that the rear A/C temperature setting is correctly adjusted.
4
Use an OBD-II scanner to check for any diagnostic trouble codes related to the A/C system.
5
Inspect the refrigerant level in the A/C system.
6
Check for blockages in the rear air conditioning ductwork.

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
•Fuse puller
•Screwdriver set
•Multimeter
•A/C refrigerant gauge set
•Refrigerant canister
•Vacuum or compressed air

Parts Required

•A/C control module (if defective)
•Fuse for rear A/C (if blown)
•R-134a refrigerant

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the rear air conditioning system fuse using the vehicle’s fuse box diagram.
2
Inspect the rear A/C control module for any visible damage or disconnections.
3
Verify that the rear A/C temperature setting is correctly adjusted.
4
Use an OBD-II scanner to check for any diagnostic trouble codes related to the A/C system.
5
Inspect the refrigerant level in the A/C system.
6
Check for blockages in the rear air conditioning ductwork.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a level surface.
Disconnect the battery to prevent any electrical short circuits.

2. Check and Replace Fuses

Tools Required: Fuse puller
Locate the fuse box and identify the fuse for the rear A/C.
Remove the fuse and inspect it for continuity. Replace if blown.

3. Inspect A/C Control Module

Tools Required: Screwdriver set, multimeter
Access the rear A/C control module, typically located under the dashboard or in the rear cabin area.
Check for loose connections or damaged wires using a multimeter.
Repair or replace the module if any faults are detected.

4. Recharge A/C System

Tools Required: A/C refrigerant gauge set, refrigerant canister
Connect the gauge to the low-pressure service port.
Check the refrigerant pressure; if low, recharge the system with the recommended R-134a refrigerant.
Monitor the pressures as you recharge until they reach manufacturer specifications.

5. Clear Blockages

Tools Required: Vacuum or compressed air
Inspect the rear air conditioning ductwork for any blockages or debris.
Use a vacuum or compressed air to remove any obstructions that may be affecting airflow.