my Ford Explorer makes a strange burning smell when I turn on the AC, what could it be?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

473 words

Problem Statement

Learn how to diagnose and fix a burning smell when activating AC in Ford Explorer. Step-by-step guide with diagnostic procedures 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 before inspecting the AC system.

Symptoms

•Burning smell from the vents
•AC not cooling effectively
•Unusual noises from the AC compressor
•Increased engine temperature
•Check engine light illuminated

Diagnostic Steps

1
Inspect the AC compressor for signs of wear or damage.
2
Check the AC belt for fraying or looseness.
3
Examine the cabin air filter for clogging or burning debris.
4
Use an OBD-II scanner to check for error codes related to the AC system.
5
Inspect the refrigerant levels and look for leaks in the AC system.

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
•Wrench set
•Refrigerant recovery kit
•Manifold gauge set

Parts Required

•AC compressor (if damaged)
•AC belt (if worn)
•Cabin air filter
•Refrigerant (if low)

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Diagnostic Steps

1
Inspect the AC compressor for signs of wear or damage.
2
Check the AC belt for fraying or looseness.
3
Examine the cabin air filter for clogging or burning debris.
4
Use an OBD-II scanner to check for error codes related to the AC system.
5
Inspect the refrigerant levels and look for leaks in the AC system.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to avoid electrical hazards.
Ensure the vehicle is parked on a level surface with the engine off.

2. Inspect AC Compressor

Tools Required: Socket set, ratchet
Remove any covers obstructing access to the AC compressor.
Check for physical damage or signs of overheating.
If damaged, proceed to replace the compressor.

3. Check and Replace AC Belt

Tools Required: Wrench set, torque wrench
Inspect the AC belt for signs of wear.
If frayed or loose, remove the old belt by loosening the tensioner.
Install a new belt ensuring proper tension according to the manufacturer’s specifications.

4. Replace Cabin Air Filter

Tools Required: None specifically
Locate the cabin air filter compartment, usually behind the glove box.
Remove the old filter and check for any burning debris.
Install a new cabin air filter ensuring it is seated correctly.

5. Recharge AC System (if necessary)

Tools Required: Refrigerant recovery kit, manifold gauge set
Check refrigerant levels; if low, evacuate the system and recharge with the appropriate refrigerant type.
Monitor system pressure to ensure it falls within the specified range.