what causes the rear heater to not work in my Ford Explorer Fifth Generation (2011-2019)?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

551 words

Problem Statement

Learn how to diagnose and fix the rear heater not working in Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

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 before opening radiator or coolant reservoir.

Symptoms

•No heat output from rear heater vents
•Front heater functioning normally
•Cool air blowing from rear vents
•Possible unusual noise from rear heater unit
•Check engine light may be illuminated

Diagnostic Steps

1
Inspect the rear heater control settings to ensure they are properly adjusted.
2
Check for any blown fuses related to the rear HVAC system.
3
Scan the vehicle's OBD-II system for error codes that may indicate HVAC issues.
4
Verify coolant level in the reservoir and check for leaks in the cooling system.
5
Examine the rear heater core for blockages or leaks.
6
Test the operation of the rear blower motor to ensure it is functioning properly.

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

•Socket set
•Multimeter
•Fuse puller
•Screwdrivers
•Garden hose

Parts Required

•Replacement fuses
•Coolant
•Rear heater core
•Rear blower motor

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Diagnostic Steps

1
Inspect the rear heater control settings to ensure they are properly adjusted.
2
Check for any blown fuses related to the rear HVAC system.
3
Scan the vehicle's OBD-II system for error codes that may indicate HVAC issues.
4
Verify coolant level in the reservoir and check for leaks in the cooling system.
5
Examine the rear heater core for blockages or leaks.
6
Test the operation of the rear blower motor to ensure it is functioning properly.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the battery to prevent electrical shocks and ensure safety.
Allow the engine to cool before starting any work on the cooling system.

2. Check and Replace Fuses

Locate the fuse box, usually found under the dashboard or in the engine compartment.
Identify the fuse associated with the rear HVAC system using the fuse diagram.
Remove the fuse using a fuse puller or pliers and inspect for damage. Replace with a new fuse if blown.

3. Inspect Coolant Level

Open the hood and locate the coolant reservoir.
Check the coolant level; it should be between the minimum and maximum markings.
If low, add the manufacturer-recommended coolant type to the reservoir.

4. Inspect Rear Heater Core

Remove the dashboard panel covering the rear HVAC unit (if applicable).
Disconnect the heater core hoses connected to the rear heater core.
Use a garden hose to flush the heater core, checking for any blockages.
If the heater core is leaking or severely clogged, replace it with a new unit.

5. Test Rear Blower Motor

Locate the rear blower motor, usually found near the rear HVAC unit.
Disconnect the electrical connector and use a multimeter to test for voltage.
If voltage is present but the motor does not operate, replace the blower motor.