2018 Ford Expedition AC Isn't Working

Common Causes of AC Failure in Your 2018 Ford Expedition and How to Restore Comfort in Your Ride

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
37% chance it's the
Refrigerant Leak
0%
21% chance it's the
Climate Control Electrical Issue
0%
12% chance it's the
AC Compressor
0%
30% chance it's
Something else
The most common reasons a 2018 Ford Expedition AC isn't working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.
  • Refrigerant Leak: A refrigerant leak can occur due to damaged hoses, seals, or connections, resulting in decreased cooling efficiency in the air conditioning system.
  • Climate Control Electrical Issue: A faulty climate control module or a blown fuse could be causing the electrical issues in the climate control system.
  • AC Compressor: A faulty AC compressor may be due to a lack of lubrication, electrical issues, or internal mechanical failure, resulting in inadequate cooling performance.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the initial diagnostic steps to take when the AC isn't working in a 2018 Ford Expedition?

When your 2018 Ford Expedition's AC isn't functioning properly, start by checking the thermostat settings to confirm they are correctly adjusted to a cool temperature. If the settings are fine, inspect the air filters for dirt or clogs, as these can significantly restrict airflow and hinder cooling performance. Next, examine the refrigerant levels using a pressure gauge; low levels may indicate a need for a recharge. It's also crucial to look for any visible leaks in the AC system, such as oily residue around hoses or connections, which can lead to refrigerant loss. Additionally, ensure that the AC compressor is engaging when the system is activated, as a malfunctioning compressor can prevent cold air from circulating. Don't overlook the importance of checking electrical connections related to the AC system; secure and corrosion-free connections are vital for proper functionality. Finally, consider using a diagnostic tool to scan for error codes in the vehicle's onboard computer, which can provide insights into specific issues affecting the AC system. By systematically following these steps, you can effectively diagnose and address common AC problems in your Ford Expedition.

What are the common problems that could cause the AC to stop working in a 2018 Ford Expedition?

When the air conditioning system in a 2018 Ford Expedition ceases to function, it can be frustrating, especially during hot weather. One of the most frequent issues is low refrigerant levels, which can occur due to leaks or insufficient charging, preventing the system from cooling effectively. Another common culprit is a faulty compressor; if the compressor is not engaging or is damaged, it will fail to circulate refrigerant, leading to inadequate cooling. Electrical problems, such as blown fuses or faulty wiring, can also disrupt the AC's operation, making it essential to check these components. Additionally, a clogged or leaking condenser can hinder the system's ability to dissipate heat, while a malfunctioning blower motor may result in weak or no airflow from the vents. By understanding these common problems, DIYers can take the first steps toward diagnosing and potentially resolving AC issues in their Ford Expedition, ensuring a comfortable ride.

How urgent is it to address the non-functioning AC in a 2018 Ford Expedition?

When it comes to a non-functioning AC in your 2018 Ford Expedition, the urgency of addressing the problem cannot be overstated. While it may not seem like an immediate emergency, the implications of driving without a working air conditioning system can be significant. First and foremost, comfort is a crucial factor; without a functioning AC, the interior of your vehicle can become uncomfortably hot, especially during long drives or in sweltering weather. This discomfort can distract the driver, leading to decreased concentration and an increased risk of accidents. Moreover, the health risks associated with extreme heat should not be overlooked. Vulnerable passengers, such as children and the elderly, are particularly susceptible to heat-related illnesses, making it essential to restore a comfortable environment inside the vehicle. Additionally, neglecting the AC issue can affect the resale value of your Expedition. A well-maintained AC system enhances the vehicle's appeal to potential buyers, making it a wise investment to address any malfunctions promptly. In summary, while the AC issue may not halt your vehicle's operation, prioritizing its repair is vital for ensuring comfort, safety, health, and maintaining the vehicle's value.

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2018 Ford Expedition AC Issues: Causes & Solutions