how to fix Ford F-150 Fourteenth Generation (2021-present) AC not blowing cold air

Ford F-150 Fourteenth Generation (2021-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

529 words

Problem Statement

Learn how to diagnose and fix AC not blowing cold air in Ford F-150 (2021-present). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

HVAC

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always wear safety goggles and gloves when working with refrigerants and AC systems.
•Ensure the engine is off when connecting or disconnecting components.

Symptoms

•No cold air coming from the vents
•AC compressor not engaging
•Unusual noises from the AC system (hissing, clicking)
•Warm air blowing even when set to low temperature
•Increased cabin humidity

Diagnostic Steps

1
Check the AC settings to ensure the system is set to maximum cooling.
2
Inspect the AC compressor for signs of damage or leaks.
3
Use an OBD-II scanner to check for any related fault codes.
4
Verify refrigerant levels using a gauge set.
5
Inspect the cabin air filter for clogs or obstructions.
6
Test the AC relay and fuses for continuity.

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

•A/C manifold gauge set
•Multimeter
•Basic hand tools
•Safety goggles
•Gloves

Parts Required

•Refrigerant (R-134a or R-1234yf, depending on the system)
•Cabin air filter

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the AC settings to ensure the system is set to maximum cooling.
2
Inspect the AC compressor for signs of damage or leaks.
3
Use an OBD-II scanner to check for any related fault codes.
4
Verify refrigerant levels using a gauge set.
5
Inspect the cabin air filter for clogs or obstructions.
6
Test the AC relay and fuses for continuity.

Solution

1. Preparation

Gather tools: A/C manifold gauge set, multimeter, basic hand tools, safety goggles, and gloves.
Ensure the vehicle is parked on a level surface and the engine is off.

2. Inspect Refrigerant Levels

Sub-step 1: Connect the low and high-pressure sides of the A/C manifold gauge set to the service ports on the AC system.
Sub-step 2: Start the engine and turn the AC to maximum cool.
Sub-step 3: Read the pressure gauges. If low, the system may be undercharged; if high, there may be a blockage or overcharge.

3. Recharge the AC System (if low refrigerant)

Sub-step 1: If refrigerant is low, attach the refrigerant canister to the low-pressure side.
Sub-step 2: Open the valve slowly and allow the refrigerant to enter the system until the correct pressure is reached (refer to manufacturer specifications).
Sub-step 3: Disconnect the gauge set and check for leaks at the service port.

4. Replace Cabin Air Filter (if clogged)

Sub-step 1: Locate the cabin air filter compartment, usually behind the glove box.
Sub-step 2: Remove any retaining clips or screws to access the filter.
Sub-step 3: Remove the old filter, noting its orientation, and install the new filter in the same direction.

5. Test the AC System

Sub-step 1: Start the engine and turn the AC to maximum cooling again.
Sub-step 2: Observe if cold air is now blowing from the vents.
Sub-step 3: Listen for any unusual noises and check for proper compressor engagement.