how to troubleshoot Ford F-150 13th Generation (2015-2020) HVAC system not working?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to prevent electrical shorts.

2. Inspect and Replace the Cabin Air Filter

• Locate the cabin air filter compartment (usually under the dashboard or behind the glove box).
• Remove any screws or clips securing the cover.
• Take out the old cabin air filter and inspect it for dirt or clogging.
• Install a new cabin air filter, ensuring it is oriented correctly.
• Reassemble the cover and secure it back in place.

3. Check Fuses

• Locate the fuse box (usually under the dashboard or in the engine compartment).
• Identify the fuses related to the HVAC system (refer to the owner's manual for specific fuse locations).
• Remove each fuse and inspect for continuity. Replace any blown fuses with the same amperage rating.

4. Test the Blower Motor

• Locate the blower motor (usually found under the passenger side dashboard).
• Disconnect the blower motor connector.
• Use a multimeter to check for voltage at the blower motor connector while operating the HVAC system.
• If no voltage is present, check the blower motor resistor for failure and replace if necessary.
• If voltage is present, replace the blower motor with a new unit.

5. Recharge the A/C System

• Connect a refrigerant gauge to the A/C service ports.
• Check pressure readings to verify if the system is low on refrigerant.
• If low, recharge the system with the appropriate refrigerant type as per manufacturer specifications.
• Monitor the system for any leaks after recharging.