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my Ford F-150 13th Generation (2015-2020) AC is blowing warm air how to fix - Ford F-150
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my Ford F-150 13th Generation (2015-2020) AC is blowing warm air how to fix

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

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
626 words

Problem Statement

Learn how to diagnose and fix the AC blowing warm air issue in your Ford F-150 (2015-2020). Step-by-step guide with tools and parts needed.

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 down before opening the AC system.
  • •Use appropriate safety gear (gloves and goggles) when handling refrigerants.

Symptoms

  • •AC compressor not engaging
  • •Warm air blowing from vents
  • •Unusual noises from the AC system
  • •AC system cycling on and off frequently
  • •Poor airflow from the vents
  • •Refrigerant leak (evidence of oil around AC components)

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

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
  • •Multimeter
  • •Torque wrench
  • •Socket set
  • •Screwdrivers

Parts Required

  • •Refrigerant (R-134a)
  • •AC compressor (if faulty)
  • •Cabin air filter
  • •AC pressure switch (if faulty)

Additional Information

Affected Component
HVAC
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
6 items
Parts Required
4 items

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Solution
1. Preparation
  • Gather tools and parts needed for the repair.
  • Disconnect the battery to ensure safety while working on electrical components.
  • Allow the vehicle to cool down if the engine has been running.
2. Recharge Refrigerant

  1. Connect Manifold Gauge Set

    • Attach the low and high-pressure sides of the manifold gauge set to the appropriate service ports.
    • Ensure all connections are secure to prevent leaks.

  2. Check Refrigerant Levels

    • Start the engine and turn the AC to maximum cold.
    • Read the pressure gauges. If low, proceed to recharge.

  3. Recharge the System

    • Use the correct type of refrigerant specified for the F-150 (R-134a).
    • Follow the manufacturer's guidelines for the correct amount of refrigerant to add.
    • Monitor the gauges while recharging to avoid overfilling.
3. Repair or Replace AC Components

  1. AC Compressor Clutch

    • If the clutch is not engaging, check the wiring and connectors leading to the compressor.
    • Replace the AC compressor if the clutch is faulty and not engaging properly.
    • Use a torque wrench to tighten bolts to manufacturer specifications (typically around 20-25 lb-ft).

  2. Replace Cabin Air Filter

    • Locate the cabin air filter housing, usually behind the glove compartment.
    • Remove the old filter and install a new one, ensuring it is oriented correctly.

  3. Inspect and Replace AC Pressure Switch

    • If the pressure switch is faulty, remove the connector and unscrew the switch.
    • Install a new pressure switch and reconnect the wiring.
4. System Leak Test
  • After repairs, conduct a leak test using a UV dye or nitrogen to check for any leaks in the AC system.
  • If leaks are found, repair them before recharging the system.