Where do you add freon on a 2000 Ford Expedition XLT?
First of all, it is dangerous to add refrigerants if you are not
familiar with the operation of A/C systems. It can be dangerous to
you - use eye protection and gloves - and it can hurt the vehicle -
if you overcharge the system for example. FREON is actually the
trade name for the older R12 REFRIGERANT. Most cars built after
1994 use R134A which is technically not FREON.
That said, if you find the A/C compressor and can look at the lines
coming from it, the low pressure side of the system is usually the
larger diameter line. Somewhere in the low side lines and hoses,
there will be a service port, usually with a BLUE CAP instead of
red. You can also try finding the A/C lines where they come out of
the firewall (passenger compartment) and follow them to find the
They can also put the service port on the ACCUMULATOR, which looks
like a cylindrical cannister with steel or rubber reinforced lines
coming out of it.