When driving a classic car like the 1968 Ford Mustang GT Fastback, you may find that using the air conditioning system isn't as intuitive as in modern vehicles. This can lead to challenges in figuring out how to operate it correctly, especially if you’re not familiar with vintage car controls. The levers, dials, and switches can be confusing if you don't know their specific functions. Here is how to solve this issue.

Step 1: Locate the Air Conditioning Controls

First, get familiar with the dashboard layout. The air conditioning system controls in the 1968 Ford Mustang GT Fastback are typically located on the central console of the dashboard. Look for three vertical sliders on the control panel.

Step 2: Understand the Sliders

There are three main sliders you’ll need to understand and use:

• Temperature Control: This slider should be on the left. Move it up to set to warmer temperatures and down for cooler temperatures.
• Fan Speed Control: Usually the middle slider. Move it up to increase the fan speed and down to decrease it. This adjusts how powerful the airflow will be.
• Air Distribution Control: The right slider. This controls where the air will be distributed inside the cabin, such as the floor, vents, or defrost options.

Step 3: Activate the Air Conditioning

To turn on the air conditioning, you'll need to set the controls correctly:

1. Temperature Control: Slide it down to the coolest setting.
2. Fan Speed Control: Slide it upward to the desired fan speed. For maximum cooling, move it to the highest setting.
3. Air Distribution Control: Set this slider to the 'AC' or 'cool' marked position, which directs cold air into the cabin.

Step 4: Ensure the AC System is On

Although the system should start functioning immediately, it’s good practice to ensure everything is correctly powered. Look for a small, round switch or button marked with 'AC' or an air conditioning symbol, which is usually near the sliders or on the dashboard. Ensure this switch is in the 'on' position.

Step 5: Adjust as Required

Once the air conditioning is running, you may need to make small adjustments:

• Fan Speed: Decrease if it's too powerful or noisy.
• Air Distribution: Adjust where you want the cool air to flow inside the car.

Step 6: Maintenance and Checks

For optimal functioning of the air conditioning system, make sure that it is well-maintained. Check for any signs of wear and tear, and ensure the refrigerant levels are adequate. If the system isn’t cooling adequately, it may need professional servicing.

By following these steps, you should be able to effectively use the air conditioning in your 1968 Ford Mustang GT Fastback, ensuring a comfortable and cool driving experience.