my Ford F-150 13th Generation (2015-2020) AC is not blowing cold air what should I do

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

576 words

Problem Statement

Learn how to diagnose and fix AC not blowing cold air in Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures 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 any electrical components.
•Wear safety goggles and gloves when handling refrigerants.
•Ensure the engine is off and cool before starting any repairs.

Symptoms

•AC compressor not engaging
•Warm air blowing from the vents
•Unusual noises from the AC system when turned on
•Increase in engine temperature
•Poor airflow from the vents

Diagnostic Steps

1
Check the AC system settings to ensure it is set to the correct mode and temperature.
2
Inspect the AC refrigerant levels using a manifold gauge set.
3
Look for any visible leaks in the AC system components, such as hoses and the condenser.
4
Test the AC compressor clutch for engagement using a multimeter.
5
Scan the vehicle's onboard computer for any trouble codes related to the HVAC system.
6
Inspect the cabin air filter for blockages or excessive dirt.

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

•Manifold gauge set
•Refrigerant canister
•Socket set
•Multimeter
•Torque wrench

Parts Required

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

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Diagnostic Steps

1
Check the AC system settings to ensure it is set to the correct mode and temperature.
2
Inspect the AC refrigerant levels using a manifold gauge set.
3
Look for any visible leaks in the AC system components, such as hoses and the condenser.
4
Test the AC compressor clutch for engagement using a multimeter.
5
Scan the vehicle's onboard computer for any trouble codes related to the HVAC system.
6
Inspect the cabin air filter for blockages or excessive dirt.

Solution

1. Preparation

Gather necessary tools and parts.
Make sure to work in a well-ventilated area.
Disconnect the battery to ensure safety during repairs.

2. Recharge AC System

Connect Manifold Gauge Set
- Attach the low-pressure side (blue) gauge to the low-pressure service port.
- Attach the high-pressure side (red) gauge to the high-pressure service port.
Check Refrigerant Levels
- Start the engine and turn the AC to max.
- Note the pressure readings on the gauges; they should fall within the manufacturer’s specifications.
- If low, proceed to recharge the system.
Recharge Refrigerant
- Connect a refrigerant canister to the low-pressure side.
- Open the valve slowly and allow the refrigerant to flow until the correct pressure is reached.
- Monitor the gauge to avoid overcharging.

3. Repair or Replace AC Components

Inspect and Replace AC Compressor (if necessary)
- Remove the serpentine belt by using a socket wrench to relieve tension on the tensioner.
- Disconnect the electrical connector and refrigerant lines from the compressor.
- Unbolt the compressor from the engine mount and replace it if defective.
Replace Cabin Air Filter (if clogged)
- Locate the cabin air filter compartment (usually behind the glove box).
- Remove the old filter and install the new one, ensuring proper orientation.

4. Test and Verify System

Reassemble and Connect
- Reconnect all components and ensure all bolts and connectors are secure.
- Reconnect the battery.
Run AC and Monitor
- Start the engine, turn on the AC, and monitor for cold air and proper airflow.
- Check for any unusual noises or leaks.