how to fix the Ford Explorer Fifth Generation (2011-2019) heating issue

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

628 words

Problem Statement

Learn how to diagnose and fix heating issues 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 the battery before working on electrical systems.
•Allow the engine to cool completely before opening the cooling system to prevent burns.

Symptoms

•Cabin temperature remains cold despite setting the heater to high.
•Heater blows cold air even when the engine is warm.
•Fluctuating temperature readings on the climate control display.
•Unusual noises from the heater core area.
•Coolant leaks under the vehicle.

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related diagnostic trouble codes (DTCs).
2
Inspect the coolant level in the reservoir and radiator to ensure it is at the proper level.
3
Check for any visible leaks in the coolant system, including hoses and the heater core.
4
Test the thermostat operation by monitoring the engine temperature as it warms up.
5
Verify the operation of the blend door actuator by listening for any movement sounds when adjusting the temperature.
6
Inspect the heater core for clogs or restrictions by feeling for temperature differences at the inlet and outlet hoses.

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
•Torque wrench
•Garden hose
•Coolant catch container

Parts Required

•Thermostat
•Coolant (50/50 mix of antifreeze and distilled water)
•Heater core hoses (if damaged)
•Blend door actuator (if malfunctioning)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related diagnostic trouble codes (DTCs).
2
Inspect the coolant level in the reservoir and radiator to ensure it is at the proper level.
3
Check for any visible leaks in the coolant system, including hoses and the heater core.
4
Test the thermostat operation by monitoring the engine temperature as it warms up.
5
Verify the operation of the blend door actuator by listening for any movement sounds when adjusting the temperature.
6
Inspect the heater core for clogs or restrictions by feeling for temperature differences at the inlet and outlet hoses.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to prevent any electrical issues.

2. Coolant System Inspection

Remove the engine cover (if applicable) using a socket set.
Check the coolant level in the reservoir; if low, top it off with the appropriate type of coolant (typically a 50/50 mix of antifreeze and distilled water).
Inspect hoses connected to the heater core for any signs of wear or leaks. Replace any damaged hoses.

3. Thermostat Replacement (if faulty)

Drain the coolant by removing the drain plug on the radiator.
Remove the thermostat housing using a socket set, taking care to catch any remaining coolant in a container.
Replace the thermostat with a new one, ensuring proper orientation.
Reinstall the thermostat housing and torque to manufacturer specifications (usually around 15-20 lb-ft).
Refill the cooling system with coolant and bleed any air from the system.

4. Heater Core Flush

Disconnect the inlet and outlet hoses from the heater core.
Use a garden hose to flush the heater core with water, ensuring any debris is removed.
Reconnect the hoses securely and check for leaks.

5. Blend Door Actuator Replacement (if malfunctioning)

Remove the dashboard panel to access the blend door actuator (refer to the service manual for specific removal procedures).
Disconnect the electrical connector from the actuator and remove the mounting screws.
Install the new actuator in reverse order, ensuring it is calibrated according to the manufacturer’s instructions.