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

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

650 words

Problem Statement

Learn how to diagnose and fix the issue of hot air blowing from vents in the 2015-2020 Ford F-150. Step-by-step guide with tools and procedures.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before opening the radiator to prevent burns.

Symptoms

•Hot air blowing from vents regardless of temperature setting
•Inconsistent cabin temperature, with some areas hotter than others
•AC system not engaging or functioning properly
•Strange noises from the dashboard area when adjusting climate controls
•Possible fogging of windows due to temperature imbalance

Diagnostic Steps

1
Check the vehicle's coolant level in the reservoir and radiator for proper levels.
2
Scan the vehicle for any error codes related to the HVAC system using an OBD-II scanner.
3
Inspect the operation of the HVAC blend door actuator for proper movement and function.
4
Test the temperature control settings to ensure the controls are functioning as intended.
5
Examine the cabin air filter for blockage or contamination.
6
Verify the functionality of the AC compressor by checking for engagement when the AC is turned on.

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
•Socket set
•Ratchet and socket set
•Coolant funnel
•AC manifold gauge set
•Flathead screwdriver

Parts Required

•Cabin air filter
•Blend door actuator (if needed)
•Coolant (if low)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Symptoms

•Hot air blowing from vents regardless of temperature setting

•Inconsistent cabin temperature, with some areas hotter than others

•AC system not engaging or functioning properly

•Strange noises from the dashboard area when adjusting climate controls

•Possible fogging of windows due to temperature imbalance

Diagnostic Steps

1
Check the vehicle's coolant level in the reservoir and radiator for proper levels.
2
Scan the vehicle for any error codes related to the HVAC system using an OBD-II scanner.
3
Inspect the operation of the HVAC blend door actuator for proper movement and function.
4
Test the temperature control settings to ensure the controls are functioning as intended.
5
Examine the cabin air filter for blockage or contamination.
6
Verify the functionality of the AC compressor by checking for engagement when the AC is turned on.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.
Ensure the vehicle is parked on a level surface with the engine off.

2. Inspect and Replace Cabin Air Filter

Tools Required: Socket set, flathead screwdriver.
Locate the cabin air filter housing, usually behind the glove box.
Remove the glove box by unscrewing any screws and releasing the clips.
Take out the old cabin air filter and inspect it for dirt or blockage.
Insert a new cabin air filter, ensuring it is oriented correctly.
Reinstall the glove box.

3. Check and Replace Blend Door Actuator

Tools Required: Ratchet and socket set.
Remove the dashboard panel covering the HVAC controls.
Locate the blend door actuator, typically found near the heater core.
Disconnect the actuator’s electrical connector and remove mounting screws.
Replace it with a new actuator, ensuring it aligns correctly with the blend door.
Reconnect the electrical connector and reinstall the dashboard panel.

4. Check Coolant Level and System

Tools Required: Coolant funnel.
Open the radiator cap and check the coolant level; fill if necessary.
Start the engine and allow it to reach operating temperature.
Monitor the temperature gauge and ensure the engine is not overheating.
If the coolant level was low, check for leaks in hoses or the radiator.

5. Test AC System

Tools Required: AC manifold gauge set.
Attach the AC manifold gauges to the high and low-pressure service ports.
Start the vehicle and turn on the AC to the maximum setting.
Check the pressure readings; they should be within manufacturer specifications.
If pressures are abnormal, consider recharging the AC system or checking for leaks.