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

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

582 words

Problem Statement

Learn how to diagnose and fix AC blowing hot air in Ford F-150 13th Generation (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 electrical components.
•Use gloves and safety glasses when handling refrigerants.

Symptoms

•AC compressor not engaging
•Warm air blowing from vents regardless of temperature setting
•Unusual noises from the AC compressor
•Poor airflow from the vents
•AC warning light illuminated on the dashboard

Diagnostic Steps

1
Check the AC system for refrigerant levels using a pressure gauge.
2
Inspect the AC compressor for any signs of damage or wear.
3
Scan the vehicle’s onboard computer for any error codes related to the AC system.
4
Verify the operation of the AC clutch by observing if it engages when the AC is turned on.
5
Examine the cabin air filter for blockages or excessive dirt accumulation.
6
Inspect the AC condenser and evaporator for any physical damage or debris.

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

•AC refrigerant gauge
•Refrigerant recharge kit
•Socket set
•Torque wrench
•Screwdriver set

Parts Required

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

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Diagnostic Steps

1
Check the AC system for refrigerant levels using a pressure gauge.
2
Inspect the AC compressor for any signs of damage or wear.
3
Scan the vehicle’s onboard computer for any error codes related to the AC system.
4
Verify the operation of the AC clutch by observing if it engages when the AC is turned on.
5
Examine the cabin air filter for blockages or excessive dirt accumulation.
6
Inspect the AC condenser and evaporator for any physical damage or debris.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety.
Allow the vehicle to cool down if it has been running.

2. Check and Recharge Refrigerant

Sub-steps:
1. Attach the refrigerant gauge to the low-pressure port of the AC system.
2. If the pressure is below the manufacturer's specifications, use a refrigerant recharge kit to add the appropriate type and amount of refrigerant (R-134a for 2015-2020 F-150).
3. Monitor the pressure while adding refrigerant to avoid overcharging.

3. Inspect and Replace AC Compressor

Sub-steps:
1. If the compressor is not engaging, remove the serpentine belt using a socket wrench.
2. Disconnect the electrical connector from the AC compressor.
3. Remove the AC compressor mounting bolts and take out the compressor.
4. Install the new compressor and torque the bolts to manufacturer specifications (typically around 20-25 ft-lbs).
5. Reconnect the electrical connector and reattach the serpentine belt.

4. Replace Cabin Air Filter

Sub-steps:
1. Open the glove box and remove the screws to access the cabin air filter compartment.
2. Take out the old cabin air filter and replace it with a new one, ensuring it is oriented correctly.
3. Reassemble the glove box.

5. Check AC Clutch Operation

Sub-steps:
1. Reconnect the battery.
2. Start the engine and turn on the AC to maximum.
3. Observe the AC clutch; if it does not engage, further inspection of the electrical system or potential replacement of the AC relay may be required.