my Ford Explorer Fifth Generation (2011-2019) AC is blowing hot air what could be wrong

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

563 words

Problem Statement

Learn how to diagnose and fix AC blowing hot air in Ford Explorer 2011-2019. 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.
•Wear safety goggles when handling refrigerants and working under the hood.

Symptoms

•AC system not cooling air
•AC compressor not engaging
•Strange noises when AC is turned on
•Foul smell coming from vents
•Check engine or AC warning light illuminated on the dashboard

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related trouble codes.
2
Inspect the AC refrigerant levels with a pressure gauge to determine if the system is low on refrigerant.
3
Check the AC compressor function by observing if the clutch is engaging when the AC is turned on.
4
Examine the cabin air filter for clogs or debris that could restrict airflow.
5
Inspect the AC relay and fuses to ensure they are in good condition and 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

•OBD-II scanner
•AC manifold gauge set
•Multimeter
•Ratchet and socket set
•Safety goggles

Parts Required

•Refrigerant (R-134a or R-1234yf as per specifications)
•Cabin air filter
•AC compressor (if found faulty)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related trouble codes.
2
Inspect the AC refrigerant levels with a pressure gauge to determine if the system is low on refrigerant.
3
Check the AC compressor function by observing if the clutch is engaging when the AC is turned on.
4
Examine the cabin air filter for clogs or debris that could restrict airflow.
5
Inspect the AC relay and fuses to ensure they are in good condition and functioning properly.

Solution

1. Preparation

Gather tools: OBD-II scanner, AC manifold gauge set, multimeter, ratchet and socket set, and safety goggles.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to prevent any electrical shorts.

2. Recharge AC System

Check Refrigerant Level:
- Attach the AC manifold gauge set to the service ports on the AC system.
- Read the pressure on both high and low sides; if low, proceed to recharge.
Recharge:
- Connect the refrigerant can to the manifold gauge set.
- Open the low-side valve and let the refrigerant flow into the system until the correct level is reached (refer to manufacturer specifications).
- Close valves and disconnect the manifold gauge set.

3. Inspect and Replace Components

Check AC Compressor:
- If the compressor does not engage, check the power supply using a multimeter.
- If faulty, replace the AC compressor.
Replace Cabin Air Filter:
- Locate the cabin air filter housing (usually under the dashboard or behind the glove compartment).
- Remove the old filter and install a new one, ensuring it is oriented correctly.

4. Test and Monitor

Reconnect the battery and start the engine.
Turn on the AC to verify that it is cooling properly. Monitor the system for any unusual noises or smells during operation.