how to fix the air conditioning not blowing cold in Ford F-150 13th Generation (2015-2020)

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

640 words

Problem Statement

Learn how to diagnose and fix the AC not blowing cold 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

•Always wear safety goggles and gloves when working with refrigerants.
•Ensure the engine is cool before working on the AC system to prevent burns.

Symptoms

•AC system blowing warm or hot air
•AC compressor not engaging
•Strange noises from the AC compressor
•Frost buildup on the AC lines
•Poor cabin air circulation

Diagnostic Steps

1
Check the AC system for any blown fuses related to the AC compressor and climate control.
2
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to the AC system.
3
Measure the refrigerant levels using a manifold gauge set to determine if the system is low on refrigerant.
4
Inspect the AC compressor visually for any signs of damage or leaks.
5
Test the AC compressor clutch to ensure it is engaging when the AC is turned on.
6
Examine the cabin air filter for clogs that could affect airflow.

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 (R-134a)
•Safety goggles
•Gloves
•Socket set
•Wrench set
•AC compressor removal tool
•Torque wrench

Parts Required

•Refrigerant (R-134a)
•AC compressor (if replacement is necessary)
•Cabin air filter

Related Faults

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Diagnostic Steps

1
Check the AC system for any blown fuses related to the AC compressor and climate control.
2
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to the AC system.
3
Measure the refrigerant levels using a manifold gauge set to determine if the system is low on refrigerant.
4
Inspect the AC compressor visually for any signs of damage or leaks.
5
Test the AC compressor clutch to ensure it is engaging when the AC is turned on.
6
Examine the cabin air filter for clogs that could affect airflow.

Solution

1. Preparation

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

2. Recharge Refrigerant

Tools Required: Manifold gauge set, refrigerant (R-134a), safety goggles, gloves.
Sub-steps:
1. Connect the low-pressure side of the manifold gauge set to the low-pressure port on the AC system.
2. Start the engine and turn the AC to the maximum setting.
3. Check the gauge readings; if low, add refrigerant slowly until the recommended pressure is reached (typically between 25-45 psi).
4. Monitor the high-pressure gauge to ensure it does not exceed safe levels (typically between 200-250 psi).
5. Disconnect the manifold gauge set and recheck for cold air.

3. Inspect and Replace AC Compressor

Tools Required: Socket set, wrench set, AC compressor removal tool, torque wrench.
Sub-steps:
1. If the compressor is not engaging, inspect the electrical connections and relay for faults.
2. If necessary, remove the serpentine belt by loosening the tensioner pulley and sliding the belt off.
3. Disconnect the AC lines from the compressor and be prepared for refrigerant leakage.
4. Remove the AC compressor mounting bolts and lift the compressor out.
5. Install the new AC compressor in the reverse order of removal, ensuring all seals are replaced.
6. Torque the mounting bolts to the manufacturer's specifications (usually around 20-30 ft-lbs).

4. Replace Cabin Air Filter

Tools Required: None (may require a flathead screwdriver for some models).
Sub-steps:
1. Locate the cabin air filter access panel, usually under the dashboard or behind the glove box.
2. Remove the access panel carefully to avoid breaking clips.
3. Take out the old cabin air filter and clean any debris from the housing.
4. Install the new cabin air filter, ensuring it is oriented correctly, and replace the access panel.