Where is the low pressure valve for recharging air conditioner on a 1999 Ford Expidition?

The low-pressure port for recharging the A/C on a 1999 Ford Expedition is usually located on the dryer/accumulator. This is a cylindrical component, often found near the front of the vehicle, on the passenger side, near the firewall. It will have two ports; one is the low-pressure port, and the other is for the high-pressure side (which you should *not* connect to when recharging).

Important Note: The low-pressure port is typically smaller than the high-pressure port. It will also have a schrader valve, similar to a tire valve, which you'll need to pierce with the recharge fitting.

However, the exact location can vary slightly depending on specific trim levels and options. It's best to:

1. Consult your owner's manual: It may have a diagram showing the location of the A/C components.

2. Look online: Search for "1999 Ford Expedition A/C low pressure port location" along with images. Pictures can be very helpful.

3. Use a repair manual: A Haynes or Chilton manual for your specific year and model will show a detailed diagram.

Caution: Recharging your A/C system requires specific tools and knowledge. Improper handling of refrigerants can be dangerous. If you're not comfortable performing this task yourself, take your vehicle to a qualified automotive technician. Improper charging can damage your system.