why does my Ford F-150 13th Generation (2015-2020) have condensation inside the windshield

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

571 words

Problem Statement

Learn how to diagnose and fix windshield condensation issues in Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening the coolant system.

Symptoms

•Fogging of the windshield during operation
•Water droplets visible between windshield layers
•Musty odor inside the cabin
•Moisture accumulation on interior surfaces
•Difficulty defogging the windshield despite using the HVAC system

Diagnostic Steps

1
Inspect the cabin air filter for dirt or blockage.
2
Check for leaks around the windshield and door seals.
3
Examine the HVAC system for proper operation and condensation issues.
4
Test the heater core for leaks or improper functioning.
5
Inspect the floor mats for signs of water intrusion or wetness.

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

•Screwdriver set
•Razor blade
•Flashlight
•Isopropyl alcohol
•Caulking gun
•Socket set
•Pliers
•Coolant catch pan

Parts Required

•New cabin air filter
•Automotive-grade silicone sealant
•New heater core

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is parked on a flat surface and turn off the ignition.
Disconnect the battery to prevent electrical issues during repairs.

2. Inspect and Replace Cabin Air Filter

Sub-steps:
1. Locate the cabin air filter access panel (usually under the glove box).
2. Remove the access panel by unscrewing or unclipping it.
3. Take out the old cabin air filter and inspect it for dirt and debris.
4. Insert a new cabin air filter (make sure it’s the correct part number).
5. Reattach the access panel securely.
Tools Required: Screwdriver set
Parts Required: New cabin air filter

3. Check and Repair Windshield Seals

Sub-steps:
1. Inspect the windshield for visible gaps or damage to the sealant.
2. Use a flashlight to check for light penetrating through any gaps.
3. If gaps are found, remove the old sealant using a razor blade.
4. Clean the surface with isopropyl alcohol.
5. Apply new automotive-grade silicone sealant around the windshield edges.
6. Allow the sealant to cure as per manufacturer recommendations.
Tools Required: Razor blade, flashlight, isopropyl alcohol, caulking gun
Parts Required: Automotive-grade silicone sealant

4. Inspect and Repair Heater Core

Sub-steps:
1. Check the passenger side floor for dampness, indicating a possible heater core leak.
2. If a leak is suspected, drain the coolant and remove the dashboard as needed.
3. Disconnect the heater core hoses.
4. Remove the heater core from its housing and inspect it for leaks.
5. Replace the heater core if damaged and reassemble with new hoses.
Tools Required: Socket set, pliers, coolant catch pan
Parts Required: New heater core, coolant