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Home/Cars/Ford/Explorer/Fifth Generation (2011-2019)/my Ford Explorer's defroster isn't working properly what should I check

my Ford Explorer's defroster isn't working properly what should I check

Ford Explorer Fifth Generation (2011-2019)

Severity: mediumDifficulty: medium2-4 hours
3 min read
477 words

Problem Statement

Learn how to diagnose and fix HVAC defroster issues in Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Component
HVAC
Repair Time
2-4 hours

Safety Warnings

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

Symptoms

  • •Defroster blows air but does not clear fog or frost effectively
  • •Air temperature from the defroster is not warm enough
  • •Unusual noises when the defroster is activated
  • •Dashboard warning lights related to the HVAC system may be illuminated
  • •Inconsistent airflow from defroster vents

Diagnostic Steps

  1. 1Check the vehicle's coolant level and ensure it is at the proper level.
  2. 2Inspect the cabin air filter for blockages or clogs.
  3. 3Scan for any error codes related to the HVAC system using an OBD-II scanner.
  4. 4Test the operation of the blower motor.
  5. 5Verify the functionality of the HVAC control system and settings.
  6. 6Inspect the heater core for leaks or blockages.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Ensure the vehicle is parked in a safe area and the engine is off.
  • Disconnect the battery to prevent electrical shock.

2. Check Coolant Level

  • Locate the coolant reservoir.
  • Remove the cap and check the coolant level.
  • If low, top it off with a 50/50 mix of antifreeze and water.

3. Replace Cabin Air Filter

  • Locate the cabin air filter housing (usually behind the glove compartment).
  • Remove the glove compartment for access.
  • Take out the old filter and replace it with a new one, ensuring proper orientation.

4. Inspect Blower Motor

  • Locate the blower motor under the dashboard on the passenger side.
  • Disconnect the electrical connector and use a multimeter to test for voltage.
  • If the blower motor is faulty, remove and replace the motor.

5. Check HVAC Control System

  • Inspect the HVAC control settings to ensure they are set to defrost.
  • If the controls are not responding, inspect wiring and connectors for damage.

6. Inspect Heater Core

  • Check for leaks under the dashboard or signs of coolant inside the cabin.
  • If the heater core is blocked, flush it with a radiator flush solution.

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
  • Multimeter
  • Socket set
  • Screwdrivers

Parts Required

  • Cabin air filter
  • Blower motor (if necessary)
  • Coolant (antifreeze)

Additional Information

Component

HVAC

Repair Time

2-4 hours

Difficulty

medium

Severity

medium

Tools

4 items

Parts

3 items

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